Trigonometry 7th Edition

Published by Cengage Learning
ISBN 10: 1111826854
ISBN 13: 978-1-11182-685-7

Chapter 5 - Section 5.1 - Proving Identities - 5.1 Problem Set - Page 278: 4

Answer

$\sin$ and $\cos$

Work Step by Step

An easier (not necessarily) method of transformation may be changing everything into $\sin$ and $\cos$ before simplifying so as to make optimum use of Pythagorean, ratio and algebraic identities in the process.
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