Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 7 - Section 7.1 - Trigonometric Identities - 7.1 Exercises: 3

Answer

$\cos t * tan t=\sin t$

Work Step by Step

$\cos t\tan t$ Change $\tan t$ with $\dfrac{\sin t}{\cos t}$: $\cos t\tan t=\cos t(\dfrac{\sin t}{\cos t})=...$ Simplify: $\cos t\tan t=\cos t(\dfrac{\sin t}{\cos t})=\sin t$
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