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: 16

Answer

$\dfrac{1+\cot A}{\csc A}=\sin A+\cos A$

Work Step by Step

$\dfrac{1+\cot A}{\csc A}$ Substitute $\cot A$ with $\dfrac{\cos A}{\sin A}$ and $\csc A$ with $\dfrac{1}{\sin A}$: $\dfrac{1+\cot A}{\csc A}=\dfrac{1+\dfrac{\cos A}{\sin A}}{\dfrac{1}{\sin A}}=...$ Evaluate the sum present in the numerator and simplify: $...=\dfrac{\dfrac{\sin A+\cos A}{\sin A}}{\dfrac{1}{\sin A}}=\sin A+\cos A$
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