Question

Arrange the steps in the correct order to express cos3x in terms of cosx

Answer 1

The correct order to express cos3x in terms of cosx is; As shown in steps 1 to 9 below.

How to simplify Trigonometric Identities?

The steps to simplify the trigonometric identities cos 3x in terms of cos x are as follows;

Step 1; cos x = cos(2x + x)

Step 2; cos(2x) cosx - sin(2x) sinx

Step 3; 1 - 2sin^2x(cosx) -(2sinxcosx)sinx

Step 4; cosx - 2sin²x cosx - 2sin²x cosx

Step 5; cosx - 4sin²x cosx

Step 6; cosx( 1 - 4sin²x)

Step 7; cosx{1 - 4(1 - cos²x)}

Step 8; cosx{-3 + 4cos²x}

Step 9; 4cos³x - 3cosx

Read more about Trigonometric Identities at; brainly.com/question/7331447

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