Answer
-1
Work Step by Step
Identities Needed:
1 + $tan^{2}$x = $sec^{2}x$
Work:
1 + $tan^{2}$x = $sec^{2}x$
-$sec^{2}x$ + $tan^{2}$x = -1
$tan^{2}$x - $sec^{2}x$ = -1
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
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 542: 7
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