Exam 11: Parametric Equations and Polar Coordinates

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Find the area of the indicated region. Round to the nearest ten-thousandth. Inner loop of Find the area of the indicated region. Round to the nearest ten-thousandth. Inner loop of

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Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.) Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.)    Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.)

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Find the speed of the object each time it crosses the x-axis. Show all your work. Find the speed of the object each time it crosses the x-axis. Show all your work.

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The object crosses the x-axis when y = 0:
y = 8sin t - 5sin 2t = 8sin t - 10sin t cos t = (sin t)(8 - 10cos t) = 0 The object crosses the x-axis when y = 0: y = 8sin t - 5sin 2t = 8sin t - 10sin t cos t = (sin t)(8 - 10cos t) = 0     At t = 0, speed = 2 At   , speed = 18 At   , speed = 14.843 At   , speed = 14.843 The object crosses the x-axis when y = 0: y = 8sin t - 5sin 2t = 8sin t - 10sin t cos t = (sin t)(8 - 10cos t) = 0     At t = 0, speed = 2 At   , speed = 18 At   , speed = 14.843 At   , speed = 14.843 At t = 0, speed = 2
At The object crosses the x-axis when y = 0: y = 8sin t - 5sin 2t = 8sin t - 10sin t cos t = (sin t)(8 - 10cos t) = 0     At t = 0, speed = 2 At   , speed = 18 At   , speed = 14.843 At   , speed = 14.843 , speed = 18
At The object crosses the x-axis when y = 0: y = 8sin t - 5sin 2t = 8sin t - 10sin t cos t = (sin t)(8 - 10cos t) = 0     At t = 0, speed = 2 At   , speed = 18 At   , speed = 14.843 At   , speed = 14.843 , speed = 14.843
At The object crosses the x-axis when y = 0: y = 8sin t - 5sin 2t = 8sin t - 10sin t cos t = (sin t)(8 - 10cos t) = 0     At t = 0, speed = 2 At   , speed = 18 At   , speed = 14.843 At   , speed = 14.843 , speed = 14.843

Find a corresponding x-y equation. Find a corresponding x-y equation.

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Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.) Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.)    Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.)

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Compute the surface area of the surface obtained by revolving the given curve about the indicated axis. Compute the surface area of the surface obtained by revolving the given curve about the indicated axis.

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Find all polar coordinate representations of the given rectangular point. Find all polar coordinate representations of the given rectangular point.

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Find the rectangular representation of the given polar point. Find the rectangular representation of the given polar point.

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Identify all values of Identify all values of   where r = 0.  where r = 0. Identify all values of   where r = 0.

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Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.) Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.)    Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.)

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Use a CAS or graphing calculator to sketch the plane curve defined by the given parametric equations. Use a window size of [-5, 5] by [-5, 5]. Use a CAS or graphing calculator to sketch the plane curve defined by the given parametric equations. Use a window size of [-5, 5] by [-5, 5].

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Find the rectangular representation of the given polar point. Find the rectangular representation of the given polar point.

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Find the arc length of the curve exactly. Find the arc length of the curve exactly.

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Find all points at which the two curves intersect. Round to the nearest ten-thousandth. Find all points at which the two curves intersect. Round to the nearest ten-thousandth.

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Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.) Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.)    Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.)

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Find the arc length of the curve exactly. Find the arc length of the curve exactly.

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Use a graphing utility to graph the conic section with focus (0, 0) and the given directrix and eccentricity. Use a window size of [-5, 5] by [-5, 5]. Directrix y = 2, e = 2

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Parametric equations for the position of an object are given. Find the object's velocity and speed at the given time. Parametric equations for the position of an object are given. Find the object's velocity and speed at the given time.

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Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.) Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.)    Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.)

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Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.) r = 2 Sketch the graph of the polar equation. (Find a corresponding x-y equation if it helps.) r = 2

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