   Chapter 5.3, Problem 5PS Trigonometry (MindTap Course List)

8th Edition
Charles P. McKeague + 1 other
ISBN: 9781305652224

Solutions

Chapter
Section Trigonometry (MindTap Course List)

8th Edition
Charles P. McKeague + 1 other
ISBN: 9781305652224
Textbook Problem

For Qustions 4 through 6, determine if the statement is true or false. cos 2 A = 2 cos A

To determine

To state:

If the given statement is TRUE or FALSE.

Explanation

Given information:

cos2A=2cosA

We need to choose some value of A and check whether the given statement is TRUE or FALSE. Using A=π6

 cos2A=2cosA cos2⋅π6=?2cosπ6 cos2⋅π36

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