Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 7 - Trigonometric Identities and Equations - 7.2 Verifying Trigonometric Identities - 7.2 Exercises - Page 666: 40



Work Step by Step

Use the identity on page 655, $1+\cot^2 t=\csc^2 t$, and subtract $1$ from both sides: $\cot^2 t=\csc^2t-1$ So $\csc^2t-1=\cot^2t$.
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