Answer
Expression 3 in column I matches with E in column 2.
Work Step by Step
$cos(-x)$=$cosx$
In cosine function, the negative sign before x does not affect the value of the function.
Expression 3 in column I matches with E in column 2.
Trigonometry (11th Edition) Clone
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
978-0-13-421743-7
ISBN 13:
978-0-13421-743-7
Chapter 5 - Trigonometric Identities - Section 5.1 Fundamental Identities - 5.1 Exercises - Page 199: 3
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