Question 890660
Verify the following identity by using an angle sum identity:
 cos(2x) = 1 – 2(sin^2x). Hint (2x = x + x)
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cos(2x) = cos(x+x) = cos^2(x) -sin^2(x) = 1-sin^2(x)-sin^2(x) = 1-2sin^2(x)
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Cheers,
Stan H.