2024 Parametric equations calc

Jan 23, 2023 · However, parametric equations give us more freedom to manipulate horizontal motion. 🗺️. A parametric equation would look something like this: x (t)=t^2-1, y (t)=3t x(t) = t2 −1,y(t) =3t. In this equation, your x-coordinate would be determined by t² - 1 t2 −1 and your y-coordinate would be determined by 3t 3t. So, when t = 1, you would ... . Abc deltaville va

calc_9.1_packet.pdf. File Size: 264 kb. File Type: pdf. Download File. Want to save money on printing? Support us and buy the Calculus workbook with all the packets in one nice spiral bound book. Solution manuals are also available.Vector, parametric, and symmetric equations are different types of equations that can be used to represent the same line. We use different equations at different times to tell us information about the line, so we need to know how to find all three types of equations. ... Want to learn more about Calculus 3? I have a step-by-step course for that. :)Mar 1, 2017 ... I think you have answered your own question. The two parametric equations can be written in Cartesian form as. x=±sin(√y).I usually use the following parametric equation to find the surface area of a regular cone z = x2 +y2− −−−−−√ z = x 2 + y 2 : x = r cos θ x = r cos. ⁡. θ. y = r sin θ y = r sin. ⁡. θ. z = r z = r. And make 0 ≤ r ≤ 2π 0 ≤ r ≤ 2 π, 0 ≤ θ ≤ 2π 0 ≤ θ ≤ 2 π.Click on the specific calculator you need. Input. Type or paste your data into the fields provided. Ensure that your data is entered correctly to get accurate results. Calculation. Once the data is entered, click the "Calculate" button. Result. The calculator will display the result instantly. To solve another problem, modify the existing input.Parametric Equations - Finding the smallest interval. 2. Finding the self intersection point of two parametric equations. Hot Network Questions Visually arrange multi-day events on a calendar If I give my daughter $50k for her wedding and she elects to use the money to pay down a house, can I sue her? Why doesn't Japanese pineapple hurt my ...parametric plot (cos^3 t, sin^3 t) Specify a range for the parameter: parametric plot (sin 10t, sin 8t), t=0..2pi. Draw a parametric curve in three dimensions: 3d parametric plot (cos t, sin 2t, sin 3t) Draw a parametric surface in three dimensions: 3d parametric plot (cos u, sin u + cos v, sin v), u=0 to 2pi, v=0 to 2pi.This precalculus video provides a basic introduction into parametric equations. It explains the process of eliminating the parameter t to get a rectangular ...In today’s activity, students use parametric equations to track Jack’s position on a Ferris wheel, realizing that his vertical and horizontal position can both be described using trigonometric functions. In questions 1-2, students evaluate and solve parametric equations. In question 4 students graph the parametric equations by first making ...One cup of popped popcorn weighs 2.24 ounces, according to Aqua-Calc.com. Popped popcorn weighs less than unpopped popcorn as moisture in each kernel is released during the popping...Second derivatives (parametric functions) A curve is defined by the parametric equations x = t 2 − 16 and y = t 4 + 3 t . What is d 2 y d x 2 in terms of t ?Intersection of 2 Equations. Added Feb 5, 2012 by bafries in Education. Find the point of intersection for a system of 2 equations. Send feedback | Visit Wolfram|Alpha. Get the free "Intersection of 2 Equations" widget for your website, blog, Wordpress, Blogger, or iGoogle. Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Find the directrix of the parabola. You can either use the parabola calculator to do it for you, or you can use the equation: y = c - (b² + 1)/ (4a) = -4 - (9+1)/8 = -5.25. If you want to learn more coordinate geometry concepts, we recommend checking the average rate of change calculator and the latus rectum calculator.Learn the basics of parametric equations in this calculus 2 lecture by Professor Leonard, a popular mathematics educator on YouTube.Parametric equations allow us to describe a wider class of curves. A parametrized curve is given by two equations, x= f(t), y= g(t). The curve consists of all the points (x,y) that can be obtained by plugging values of tfrom a particular domain into both of the equations x= f(t), y= g(t). We may think of the parametric equations as describing theEquations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp. Coordinate ... linear-algebra-calculator. en. Related Symbolab blog posts. The Matrix, Inverse. For matrices there is no such thing as ...Equations where x and y are dependent on a third variable. To better organize out content, we have unpublished this concept. This page will be removed in future.Let's sketch the parabola defined by the parametric equation. F(t) = (x(t), y(t)) x(t) = 5t y(t) = 20t + 5t2. To sketch the parabola, you'll need to put it in standard form. You can do this by eliminating t from the equation. Solve one equation for t, and substitute that value for t into the second equation.To find the linear equation you need to know the slope and the y-intercept of the line. To find the slope use the formula m = (y2 - y1) / (x2 - x1) where (x1, y1) and (x2, y2) are two points on the line. The y-intercept is the point at which x=0.Equations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp ... take the derivative of both sides of the equation with respect to the independent variable then solve for the derivative of the ...Packet. calc_9.1_packet.pdf. File Size: 264 kb. File Type: pdf. Download File. Want to save money on printing? Support us and buy the Calculus workbook with all the packets in one nice spiral bound book.Parametric Equations, Polar Coordinates, and Vector-Valued Functions : 11-12%: Unit 10: Infinite Sequences and Series : 17-18%: How is the AP Calculus BC exam is scored? Scores are based on the number of questions answered correctly. no points are deducted for wrong answers. No points are awarded for unanswered questions.Equations Inequalities System of Equations System of Inequalities Basic Operations Algebraic Properties Partial Fractions Polynomials Rational Expressions Sequences Power Sums Interval Notation Pi ... calculus-calculator. parametric differentiation. en. Related Symbolab blog posts. High School Math Solutions – Derivative Calculator, the Basics.Example Question #2 : Parametric Calculations. Calculate at the point on the curve defined by the parametric equations , Possible Answers: None of the other answers. Correct answer: None of the other answers. Explanation: The correct answer is . We use the equation But we need a value for to substitute into our derivative.Graph the set of parametric equations and find the Cartesian equation: {x (t) = − 2 sin t y (t) = 5 cos t. {x (t) = − 2 sin t y (t) = 5 cos t. 22 . A ball is launched with an initial velocity of 95 feet per second at an angle of 52° to the horizontal.One cup of popped popcorn weighs 2.24 ounces, according to Aqua-Calc.com. Popped popcorn weighs less than unpopped popcorn as moisture in each kernel is released during the popping...Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/math/ap-calculus-bc/bc-advanced-fun...Find the directrix of the parabola. You can either use the parabola calculator to do it for you, or you can use the equation: y = c - (b² + 1)/ (4a) = -4 - (9+1)/8 = -5.25. If you want to learn more coordinate geometry concepts, we recommend checking the average rate of change calculator and the latus rectum calculator.Question 2. At time t, the position of a particle moving in the xy-plane is given by the parametric functions ( x ( t ) , y ( t ) ) , where dx = t 2 + sin ( 3 t 2 ) dt . The graph of y, consisting of three line segments, is shown in the figure above. At t = 0, the particle is at position ( 5,1 ) . Find the position of the particle at t = 3.Oct 17, 2010 ... This video explains how to graph parametric equations on the TI83/TI84 graphing calculator. http://mathispower4u.yolasite.com/Solution. The Cartesian coordinate of a point are (−8,1) ( − 8, 1). Determine a set of polar coordinates for the point. Solution. For problems 5 and 6 convert the given equation into an equation in terms of polar coordinates. 4x 3x2+3y2 = 6−xy 4 x 3 x 2 + 3 y 2 = 6 − x y Solution. x2 = 4x y −3y2 +2 x 2 = 4 x y − 3 y 2 + 2 Solution.In the equation y = 5x - 3, x is the independent variable and y is the dependent variable. In a parametric equation, t is the independent variable, and x and y are both dependent variables. Start by setting the independent variables x and t equal to one another, and then you can write two parametric equations in terms of t: x = t. y = 5t - 3Make sure to change the mode on the calculator to parametric (PAR). To confirm, the Y = Y = window should show. X 1 T = Y 1 T = X 1 T = Y 1 T = instead of Y 1 =. Y 1 =. ... Parametric equations, however, illustrate how the values of x and y change depending on t, as the location of a moving object at a particular time.Section 9.2 : Tangents with Parametric Equations. Back to Problem List. 3. Find the equation of the tangent line (s) to the following set of parametric equations at the given point. x =2cos(3t)−4sin(3t) y = 3tan(6t) at t = π 2 x = 2 cos. ⁡.Free matrix equations calculator - solve matrix equations step-by-stepAP Calculus BC – Worksheet 63 Parametric Equations 1 Sketch the parametric curves. Find an equation that relates x and y directly. a) x t y t t 2 3 and 4 3 for in the interval 0,3> @ b) x t y t tsin and 2cos for in the interval 0,> S@ 2 Find (a) dy dx and (b) 2 2 dy dx in terms of t. a) x t y t 4sin , 2cos b) x t t y t 233, c)Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. Enter a problem... Precalculus Examples. Popular Problems. Precalculus. Eliminate the Parameter x=2-3t , y=5+t, Step 1. Set up the parametric equation for to solve the ...About this unit. While we're often familiar with functions that output just one variable and are graphed with Cartesian coordinates, there are other possibilities! Vector-valued …Lecture 5: Parametric Equations. Topics covered: Parametric equations for lines and curves. Instructor: Prof. Denis Auroux. MIT OpenCourseWare is a web based publication of virtually all MIT course content. OCW is open and available to the world and is a permanent MIT activity.Convert to Rectangular x=t^2 , y=t^9. x = t2 x = t 2 , y = t9 y = t 9. Set up the parametric equation for x(t) x ( t) to solve the equation for t t. x = t2 x = t 2. Rewrite the equation as t2 = x t 2 = x. t2 = x t 2 = x. Take the specified root of both sides of the equation to eliminate the exponent on the left side. t = ±√x t = ± x.Equations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp. Coordinate Geometry Plane Geometry ... area-between-curves-calculator. en. Related Symbolab blog posts. Practice, practice, practice. Math ...Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history ...Parametric equation plotter. Edit the functions of t in the input boxes above for x and y. Use functions sin (), cos (), tan (), exp (), ln (), abs (). Adjust the range of values for which t is plotted. For example to plot type and . Use the slider to trace the curve out up to a particular t value. You can zoom in or out, add points or lines ...Simultaneous Equations Solver. Solver for a system of two equations and two unknowns. Get the free "Simultaneous Equations Solver" widget for your website, blog, Wordpress, Blogger, or iGoogle. Find more Mathematics widgets in Wolfram|Alpha.This online calculator finds parametric equations for a line passing through the given points. Articles that describe this calculator. Equation of a line given two ...Section 16.2 : Line Integrals - Part I. In this section we are now going to introduce a new kind of integral. However, before we do that it is important to note that you will need to remember how to parameterize equations, or put another way, you will need to be able to write down a set of parametric equations for a given curve.Learn how to boost your finance career. The image of financial services has always been dominated by the frenetic energy of the trading floor, where people dart and weave en masse ...Learn how to apply calculus to parametric equations in this engaging lecture video. Explore topics such as derivatives, integrals, and arc length.9.1 Parametric Equations. Calculus. Practice. For the given parametric equations, eliminate the parameter and write the corresponding rectangular equation. and 1. 2. Let be a curve described by the parametrization. 5 and 3. Find an expression for the slope of the line tangent to at any point , .I usually use the following parametric equation to find the surface area of a regular cone z = x2 +y2− −−−−−√ z = x 2 + y 2 : x = r cos θ x = r cos. ⁡. θ. y = r sin θ y = r sin. ⁡. θ. z = r z = r. And make 0 ≤ r ≤ 2π 0 ≤ r ≤ 2 π, 0 ≤ θ ≤ 2π 0 ≤ θ ≤ 2 π.Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history ...Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.As a result, Wolfram|Alpha also has separate algorithms to show algebraic operations step by step using classic techniques that are easy for humans to recognize and follow. This includes elimination, substitution, the quadratic formula, Cramer's rule and many more. Free Online Equation Calculator helps you to solve linear, quadratic and ...Graphing parametric equations on the Desmos Graphing Calculator is as easy as plotting an ordered pair. Instead of numerical coordinates, use expressions in terms of t, like (cos t, sin t ). Graph lines, curves, and relations with ease. Whether you’re interested in form, function, or both, you’ll love how Desmos handles parametric equations.Parametric equations primarily describe motion and direction. When we parameterize a curve, we are translating a single equation in two variables, such as [latex]x[/latex] and [latex]y [/latex], into an equivalent pair of equations in three variables, [latex]x,y[/latex], and [latex]t[/latex]. One of the reasons we parameterize a curve is ...This section includes lectures on parametric curves, polar coordinates, and graphing. Browse Course Material ... Calculus. Differential Equations. Learning Resource Types grading Exams with Solutions. ... Part C: Parametric Equations and Polar CoordinatesArc length of parametric curves is a natural starting place for learning about line integrals, a central notion in multivariable calculus.To keep things from getting too messy as we do so, I first need to go over some more compact notation for these arc length integrals, which you can find in the next article.This simple question posed by American pastor Robert Schuller may help inspire us to try to accomplish our goals. Taking fear out of the equation, what are your biggest dreams? Thi...Applications of Parametric Equations. A regular function has the ability to graph the height of an object over time. Parametric equations allow you to actually graph the complete position of an object over time. For example, parametric equations allow you to make a graph that represents the position of a point on a Ferris wheel.AP Calculus BC – Worksheet 63 Parametric Equations 1 Sketch the parametric curves. Find an equation that relates x and y directly. a) x t y t t 2 3 and 4 3 for in the interval 0,3> @ b) x t y t tsin and 2cos for in the interval 0,> S@ 2 Find (a) dy dx and (b) 2 2 dy dx in terms of t. a) x t y t 4sin , 2cos b) x t t y t 233, c)Definition: Parametric Equations. If x and y are continuous functions of t on an interval I, then the equations. x = x(t) and. y = y(t) are called parametric equations and t is called the parameter. The set of points (x, y) obtained as t varies over the interval I is called the graph of the parametric equations.Examples demonstrating how to find a parametric representation for various surfaces. Finding the equation of the tangent plane to a surface that is represent... This online calculator finds parametric equations for a line passing through the given points. Articles that describe this calculator. Equation of a line given two ... FlexBook Platform®, FlexBook®, FlexLet® and FlexCard™ are registered trademarks of CK-12 Foundation.Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. 3D Parametric Curve Grapher | DesmosThe function grapher appends a suitable interval to function expressions and graphs them on the specified domain. For Cartesian graphs it appends dom=(-∞, ∞), and for polar graphs it appends dom=(0, 2π).You can change the endpoints, but they must be finite for graphing functions in the polar coordinate system.The polar function grapher automatically changes infinite values to finite ones.Free slope calculator - find the slope of a line given two points, a function or the intercept step-by-step ... slope-calculator. parametric equation. en. Related Symbolab blog posts. ... this is serious stuff; it's about finding the slope of a line, finding the equation of a line... Enter a problem. Cooking Calculators. Cooking Measurement ...Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more.Meet an AP®︎ teacher who uses AP®︎ Calculus in his classroom. 3:26. Bill Scott uses Khan Academy to teach AP®︎ Calculus at Phillips Academy in Andover, Massachusetts, and he's part of the teaching team that helped develop Khan Academy's AP®︎ lessons. Phillips Academy was one of the first schools to teach AP®︎ nearly 60 years ago.parametric equations. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals.Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. ... Parametric equations arc length. Save Copy. Log InorSign Up. x-coordinate. 1. f t = 1 + 3 t 2. 2. y-coordinate. 3. g t = 4 + 2 ...Parametric Equations. { x = t2 +1 y = ln(t+ t2 +1) Precalculus. Parametric Equations. { x = 3sint y = 2cost. Get instant solutions and step-by-step explanations with online math calculator.x = x(t)andy = y(t) are called parametric equations and t is called the parameter. The set of points (x, y) obtained as t varies over the interval I is called the graph of the parametric equations. The graph of parametric equations is called a parametric curve or plane curve, and is denoted by C. Notice in this definition that x and y are used ...Free derivative calculator - differentiate functions with all the steps. Type in any function derivative to get the solution, steps and graphThis calculus 2 video tutorial explains how to find the arc length of a parametric function using integration techniques such as u-substitution, factoring, a...From this circle equation, you can easily tell the coordinates of the center and the radius of the circle. Parametric Form Equation of a Circle. The parametric equation of a circle with the center at and radius is This equation is called "parametric" because the angle theta is referred to as a "parameter". This is a variable which can take any ...Parametric equations primarily describe motion and direction. When we parameterize a curve, we are translating a single equation in two variables, such as [latex]x[/latex] and [latex]y [/latex], into an equivalent pair of equations in three variables, [latex]x,y[/latex], and [latex]t[/latex]. One of the reasons we parameterize a curve is ...A line that passes through point (h,k) (h,k) with slope m m can be described by the parametric equation. x = h + t, \quad y = k + mt. x = h+t, y = k +mt. More generally, let m = \tan \alpha, m = tanα, where \alpha α is the tilt angle. Changing t t to t\cos\alpha, tcosα, the parametric equation will become.calc_9.1_packet.pdf. File Size: 264 kb. File Type: pdf. Download File. Want to save money on printing? Support us and buy the Calculus workbook with all the packets in one nice spiral bound book. Solution manuals are also available.

In the two-dimensional coordinate system, parametric equations are useful for describing curves that are not necessarily functions. The parameter is an independent variable that both \ (x\) and \ (y\) depend on, and as the parameter increases, the values of \ (x\) and \ (y\) trace out a path along a plane curve.. Ilovegrowingmarijuana promo code

Solution. Determine the surface area of the portion of the surface given by the following parametric equation that lies inside the cylinder u2 +v2 =4 u 2 + v 2 = 4 . →r (u,v) = 2u,vu,1 −2v r → ( u, v) = 2 u, v u, 1 − 2 v Solution. Here is a set of practice problems to accompany the Parametric Surfaces section of the Surface Integrals ...With help of this calculator you can: find the matrix determinant, the rank, raise the matrix to a power, find the sum and the multiplication of matrices, calculate the inverse matrix. Just type matrix elements and click the button. Leave extra cells empty to enter non-square matrices. You can use decimal fractions or mathematical expressions ...Given a parametric curve where our function is defined by two equations, one for x and one for y, and both of them in terms of a parameter t, x=f(t) and y=g(t), we’ll calculate the area under the parametric curve using a very specific formula. The answer we get will be a function that models area, n.This calculator will find either the equation of the circle from the given parameters or the center, radius, diameter, circumference (perimeter), area, eccentricity, linear eccentricity, x-intercepts, y-intercepts, domain, and range of the entered circle. Also, it will graph the circle. Steps are available.b. Sometimes it is necessary to be a bit creative in eliminating the parameter. The parametric equations for this example are. \ [ x (t)=4 \cos t onumber \] and. \ [ y (t)=3 \sin t onumber \] Solving either equation for \ (t\) directly is not advisable because sine and cosine are not one-to-one functions.At time t, the position of a particle moving in the xy-plane is given by the parametric functions (x(t), y(t)), where t + sin 3t . The graph of y, consisting of three line segments, is shown in the figure above. At t = O, the particle is at position (5, 1). 2. (a) (b) (c) (d) Find the position of the particle at t5. Find the equation of the tangent line to the curve give n by the parametric equations x t t t y t t t 23 3 4 2 and 4 at the point on the curve where t = 1. 6. If x t e y e2 tt1 and 2 are the equations of the path of a particle moving in the xy-plane, write an equation for the path of the particle in terms of x and y. 7.AP Calculus BC CHAPTER 11 WORKSHEET PARAMETRIC EQUATIONS AND POLAR COORDINATES ANSWER KEY Derivatives and Equations in Polar Coordinates 1. The graphs of the polar curves 𝑟1=6sin3θ and 𝑟2=3 are shown to the right. (You may use your calculator for all sections of this problem.) a) Find the coordinates of the points of intersectionWhile most graphs are represented with equations involving variables x and y, there are some curves that are best handled with a third variable t called a parameter.. Parametric Equations of a curve express the coordinates of the points of the curve as functions of a third variable.. Typically, this parameter is designated t, for time, but as stated by Wikipedia, the parameter may represent ...Formula and Variable Descriptions. The calculator follows this formula: Solve one of the equations for “t” in terms of “x” or “y”, substitute the expression for “t” from the first step into the other equation, and simplify. The variables are as follows: ‘x’ and ‘y’ are coordinates, ‘t’ is the parameter, and ‘a ...Equations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp ... take the derivative of both sides of the equation with respect to the independent variable then solve for the derivative of the ...Learn math Krista King September 4, 2020 math, learn online, online course, online math, calculus 2, calculus ii, calc 2, calc ii, parametric equations, polar and parametric curves, parametric curves, eliminating the parameter. Facebook 0 Twitter LinkedIn 0 Reddit Tumblr Pinterest 0 0 Likes.Want to learn more about CALCULUS 3? I have a step-by-step course for that. :) Learn More Example problem of how to find the line where two planes intersect, in parametric for. Example. Find the parametric equations for the line of intersection of the planes.???2x+y-z=3?????x-y+z=3??? We need to find the vector equation of the line of ...1. Determine the parametric equations of the position of a particle with constant velocity that follows a straight line path in space if it starts at the point R ( −10, 10, 6 ) and after one second it is at the point S ( 10, −2, 5 ). x (t) = My answer is -10+20t. y (t) = My answer is 10-12t.Definition: Parametric Equations. If x and y are continuous functions of t on an interval I, then the equations. x = x(t) and. y = y(t) are called parametric equations and t is called the parameter. The set of points (x, y) obtained as t varies over the interval I is called the graph of the parametric equations.Equations Inequalities Scientific Calculator Scientific Notation Arithmetics Complex Numbers Polar/Cartesian Simultaneous Equations System of Inequalities Polynomials Rationales Functions Arithmetic & Comp. Coordinate Geometry Plane Geometry Solid Geometry Conic Sections Trigonometry. Calculus.PARAMETRIC INTERNATIONAL EQUITY FUND CLASS A- Performance charts including intraday, historical charts and prices and keydata. Indices Commodities Currencies StocksDec 29, 2020 · The graph of the parametric equations x = t(t2 − 1), y = t2 − 1 crosses itself as shown in Figure 9.34, forming a "teardrop.''. Find the arc length of the teardrop. Solution. We can see by the parametrizations of x and y that when t = ± 1, x = 0 and y = 0. This means we'll integrate from t = − 1 to t = 1. Graphing Parametric Equations. Author: Brian Sterr. Topic: Equations. Graph parametric equations by entering them in terms of above. You can set the minimum and maximum values for . Pay attention to the initial point, terminal point and direction of the parametric curve.Explore math with our beautiful, free online graphing calculator. Graph functions, plot points, visualize algebraic equations, add sliders, animate graphs, and more. Parametric equations. Save Copy ... Log InorSign Up. Adjust the x and y coordinates of the parametric equation: 1. X t = t 3 − 5 t. 2. Y t = t 2 − 3. 3. Click to "play" the ....

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