Identify the symmetries of the curves in Exercises 1–3. Then sketch the curves in the xy-plane. 1.r = cos (u/2) 2. r2 = sin u 3. r2 = -cos u

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.6: Additional Trigonometric Graphs
Problem 78E
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Identify the symmetries of the curves in Exercises 1–3. Then sketch the curves in the xy-plane.

1.r = cos (u/2)

2. r2 = sin u

3. r2 = -cos u

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