Use the identity cos^2 x = 1/2 (1 + cos 2x) to find the Maclaurin series for f (x) = cos^2 x.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.3: Geometric Sequences
Problem 49E
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Use the identity cos^2 x = 1/2 (1 + cos 2x) to find the Maclaurin series for f (x) = cos^2 x.

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