Answer
See graph, $x+y=1$
Work Step by Step
1. See graph for $(sin^2(t),cos^2(t))$ over $0\le t\le2\pi$
2. Use the relation $sin^2t+cos^2t=1$, we have $x+y=1$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 9 - Analytic Geometry - Section 9.7 Plane Curves and Parametric Equations - 9.7 Assess Your Understanding - Page 714: 25
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