Trigonometry (10th Edition)

Published by Pearson
ISBN 10: 0321671775
ISBN 13: 978-0-32167-177-6

Chapter 1 - Trigonometric Functions - Section 1.3 Trigonometric Functions - 1.3 Exercises: 92

Answer

1

Work Step by Step

1. Lets find the values of given trig functions $\sin (-180)^{\circ}=0$ $\cos(-180)^{\circ}=-1$ 2.Substitute the values in the original expression: $(-1)^{2}+(0)^{2}=1$
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