2 EXAMPLE 4 If the ellipse defined by the equation below is rotated counterclockwise through an angle 3/10 about the origin, find a polar equation and graph the resulting ellipse. 10 r = 3 - 2 cos(0) SOLUTION We get an equation of the rotated ellipse by replacing with in the 2 equation above. So the new equation is We use this equation to graph the rotated ellipse in the figure. Notice that the ellipse has been rotated about its left focus at the origin.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter11: Topics From Analytic Geometry
Section11.2: Ellipses
Problem 32E
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6
2
EXAMPLE 4 If the ellipse defined by the equation below is rotated counterclockwise through an angle
3π/10 about the origin, find a polar equation and graph the resulting ellipse.
r =
10
3 - 2 cos(0)
SOLUTION We get an equation of the rotated ellipse by replacing with
in the
2
equation above. So the new equation is
We use this equation to graph the rotated ellipse in the figure. Notice that the ellipse has been rotated
about its left focus at the origin.
Transcribed Image Text:6 2 EXAMPLE 4 If the ellipse defined by the equation below is rotated counterclockwise through an angle 3π/10 about the origin, find a polar equation and graph the resulting ellipse. r = 10 3 - 2 cos(0) SOLUTION We get an equation of the rotated ellipse by replacing with in the 2 equation above. So the new equation is We use this equation to graph the rotated ellipse in the figure. Notice that the ellipse has been rotated about its left focus at the origin.
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