when does cos^2 x=sin^2 x?

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- Feb 4th 2010, 03:26 PMAmberosia32when does cos^2x=sin^2x?
when does cos^2 x=sin^2 x?

- Feb 4th 2010, 03:32 PMProve It
- Feb 4th 2010, 03:48 PMArchie Meade
- Feb 4th 2010, 06:43 PMSoroban
Hello, Amberosia32!

Quote:

When does

We have: .

Divide by .

Therefore: .

- Feb 4th 2010, 11:22 PMpacman
cos^2 x = sin^2 x?