   Chapter 8.4, Problem 2E ### Calculus: An Applied Approach (Min...

10th Edition
Ron Larson
ISBN: 9781305860919

#### Solutions

Chapter
Section ### Calculus: An Applied Approach (Min...

10th Edition
Ron Larson
ISBN: 9781305860919
Textbook Problem
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# Differentiating Trigonometric Functions In Exercises 1-28, find the derivative of the trigonometric function. See Examples 1, 2, 3, f ( x )   =   cos   7 x

To determine

To calculate: The derivative of the trigonometric function f(x)=cos7x.

Explanation

Given Information:

The provided trigonometric function is f(x)=cos7x.

Formula used:

Cosine differentiation rule:

ddx[cosu]=sinududx

General power rule of differentiation:

ddx[xn]=nxn1

Calculation:

Consider the trigonometric function is,

f(x)=cos7x

Now, consider u=7x.

Then, the provided trigonometric function became as,

f(x)=cosu

Differentiate the above function f with respect to x by using Cosine and power rule of differentiation

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