cos²x-sin²x=1-2sin²x

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1 Answer

cos²x-sin²x=1-2sin²x

cos^2(x) = 1 - sin^2(x)

1-sin^2(x) - sin^2(x) = 1-2sin^2(x)

1 - 2sin²x=1-2sin²x

by Level 8 User (36.8k points)

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