`g(theta) = (cos(8theta))^2` Find the derivative of the function.

Textbook Question

Chapter 2, 2.4 - Problem 56 - Calculus of a Single Variable (10th Edition, Ron Larson).
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hkj1385 | (Level 1) Assistant Educator

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`g(theta) = {cos(8theta)}^2 = cos^2(8theta)`

`g'(theta) = 2*cos(8theta)*(-sin(8theta))*8`

`or, g'(theta) = -16sin(8theta)cos(8theta)`

`or, g'(theta) = -8*sin(16theta)`

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