Exam 10: Parametric Equations and Polar Coordinates

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Consider the polar equation Consider the polar equation   . (a) Find the eccentricity and an equation of the directrix of the conic. (b) Identify the conic. (c) Sketch the curve. . (a) Find the eccentricity and an equation of the directrix of the conic. (b) Identify the conic. (c) Sketch the curve.

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a. a.   b. ellipse c.
b. ellipse
c. a.   b. ellipse c.

Find an equation of the hyperbola with vertices Find an equation of the hyperbola with vertices   and asymptotes   . and asymptotes Find an equation of the hyperbola with vertices   and asymptotes   . .

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A

Find the surface area generated by rotating the lemniscate Find the surface area generated by rotating the lemniscate   about the line   . about the line Find the surface area generated by rotating the lemniscate   about the line   . .

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B

Find an equation for the conic that satisfies the given conditions. parabola, vertex (0, 0), focus (0, - Find an equation for the conic that satisfies the given conditions. parabola, vertex (0, 0), focus (0, -   ) )

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Find an equation of the parabola with focus Find an equation of the parabola with focus   and directrix   . and directrix Find an equation of the parabola with focus   and directrix   . .

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Suppose a planet is discovered that revolves around its sun in an elliptical orbit with the sun at one focus. Its perihelion distance (minimum distance from the planet to the sun) is approximately 1.3 Suppose a planet is discovered that revolves around its sun in an elliptical orbit with the sun at one focus. Its perihelion distance (minimum distance from the planet to the sun) is approximately 1.3   km, and its aphelion distance (maximum distance from the planet to the sun) is approximately 6.9   km. Approximate the eccentricity of the planet's orbit. Round to three decimal places. km, and its aphelion distance (maximum distance from the planet to the sun) is approximately 6.9 Suppose a planet is discovered that revolves around its sun in an elliptical orbit with the sun at one focus. Its perihelion distance (minimum distance from the planet to the sun) is approximately 1.3   km, and its aphelion distance (maximum distance from the planet to the sun) is approximately 6.9   km. Approximate the eccentricity of the planet's orbit. Round to three decimal places. km. Approximate the eccentricity of the planet's orbit. Round to three decimal places.

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Write a polar equation in r and θ\theta of an ellipse with the focus at the origin, with the eccentricity  Write a polar equation in r and  \theta  of an ellipse with the focus at the origin, with the eccentricity   and directrix   . and directrix  Write a polar equation in r and  \theta  of an ellipse with the focus at the origin, with the eccentricity   and directrix   . .

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Find a Cartesian equation for the curve described by the given polar equation. Find a Cartesian equation for the curve described by the given polar equation.

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Find the area of the region that is bounded by the given curve and lies in the specified sector. Find the area of the region that is bounded by the given curve and lies in the specified sector.

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The graph of the following curve is given. Find the area that it encloses. The graph of the following curve is given. Find the area that it encloses.    The graph of the following curve is given. Find the area that it encloses.

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Set up an integral that represents the length of the curve. Then use your calculator to find the length correct to four decimal places. Set up an integral that represents the length of the curve. Then use your calculator to find the length correct to four decimal places.

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The point in a lunar orbit nearest the surface of the moon is called perilune and the point farthest from the surface is called apolune. The Apollo 11 spacecraft was placed in an elliptical lunar orbit with perilune altitude The point in a lunar orbit nearest the surface of the moon is called perilune and the point farthest from the surface is called apolune. The Apollo 11 spacecraft was placed in an elliptical lunar orbit with perilune altitude   km and apolune altitude   km (above the moon). Find an equation of this ellipse if the radius of the moon is   km and the center of the moon is at one focus. km and apolune altitude The point in a lunar orbit nearest the surface of the moon is called perilune and the point farthest from the surface is called apolune. The Apollo 11 spacecraft was placed in an elliptical lunar orbit with perilune altitude   km and apolune altitude   km (above the moon). Find an equation of this ellipse if the radius of the moon is   km and the center of the moon is at one focus. km (above the moon). Find an equation of this ellipse if the radius of the moon is The point in a lunar orbit nearest the surface of the moon is called perilune and the point farthest from the surface is called apolune. The Apollo 11 spacecraft was placed in an elliptical lunar orbit with perilune altitude   km and apolune altitude   km (above the moon). Find an equation of this ellipse if the radius of the moon is   km and the center of the moon is at one focus. km and the center of the moon is at one focus.

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Using the arc length formula, set up, but do not evaluate, an integral equal to the total arc length of the ellipse. Using the arc length formula, set up, but do not evaluate, an integral equal to the total arc length of the ellipse.

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Find the eccentricity of the conic. Find the eccentricity of the conic.

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Find the area enclosed by the curve Find the area enclosed by the curve   . .

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The curve The curve   cross itself at some point   . Find the equations of both tangent lines at that point. cross itself at some point The curve   cross itself at some point   . Find the equations of both tangent lines at that point. . Find the equations of both tangent lines at that point.

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Find the area of the region that lies inside the first curve and outside the second curve. Find the area of the region that lies inside the first curve and outside the second curve.

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Write a polar equation in r and θ\theta of an ellipse with the focus at the origin, with the eccentricity  Write a polar equation in r and  \theta of an ellipse with the focus at the origin, with the eccentricity   and vertex at   . and vertex at  Write a polar equation in r and  \theta of an ellipse with the focus at the origin, with the eccentricity   and vertex at   . .

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Find an equation of the tangent to the curve at the point corresponding to the given value of the parameter. Find an equation of the tangent to the curve at the point corresponding to the given value of the parameter.

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Set up, but do not evaluate, an integral that represents the length of the parametric curve. Set up, but do not evaluate, an integral that represents the length of the parametric curve.

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