SOLUTION: Solve in radians(must work with left side) 1-2sin^2*x=cos^2*x

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Question 155107: Solve in radians(must work with left side)
1-2sin^2*x=cos^2*x
Answer by stanbon(48558) About Me  (Show Source):
You can put this solution on YOUR website!
Solve in radians(must work with left side)
1-2sin^2*x=cos(2x)
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since sin^2 + cos^2 = 1
Substitute for "1" to get:
(sin^2 + cos^2) - 2sin^2 = cos(2x)
cos^2x - sin^2x = cos(2x)
cos(2x) = cos(2x)
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Cheers,
Stan H.