Interval [0,2pi)2 cos^2 x - cos x = 0?

BolkowN 2021-01-19 Answered

Interval [0,2π)
2cos2xcosx=0?

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Expert Answer

jlo2niT
Answered 2021-01-20 Author has 96 answers
use the double angle formula:
2cos2x=1+cos(2x)
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