3 years ago

Prove -1 - cos^2 x = sin^2 x

1 answer:

6 0

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

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

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

- 1 - cos^2(x) = sin^2(x) is proven incorrect.

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Prove -1 - cos^2 x = sin^2 x​