Question
Asked Oct 27, 2019
52 views

Solve the given equation.  
cos(2θ) = cos2(θ) − 1/2

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Expert Answer

Step 1

Use the double angle for...

1
cos (20) cos' 0
2
2 cos20- cos'0-
2
2cos2 0-cos20=1-
2
1
cos20
2
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Image Transcriptionclose

1 cos (20) cos' 0 2 2 cos20- cos'0- 2 2cos2 0-cos20=1- 2 1 cos20 2

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Math

Trigonometry