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 - Page 543: 15

Answer

$\dfrac{\sin t+\tan t}{\tan t}=\cos t+1$

Work Step by Step

$\dfrac{\sin t+\tan t}{\tan t}$ Substitute $\tan t$ with $\dfrac{\sin t}{\cos t}$: $\dfrac{\sin t+\tan t}{\tan t}=\dfrac{\sin t+\dfrac{\sin t}{\cos t}}{\dfrac{\sin t}{\cos t}}=...$ Evaluate the sum present in the numerator and simplify: $...=\dfrac{\dfrac{(\sin t)(\cos t)+\sin t}{\cos t}}{\dfrac{\sin t}{\cos t}}=\dfrac{\sin t\cos t+\sin t}{\sin t}=\cos t+1$
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