Work it by just knowing that

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- Nov 6th 2008, 09:37 AM #1

- Joined
- Oct 2008
- Posts
- 9

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

I'm having trouble finding x for the folowing identity

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

I can see that x is 2k*PI + PI/2 but how do you proove it( I tried doing it but got weird results) and are there other values that satisfy the equation?

pls help

- Nov 6th 2008, 10:04 AM #2

- Nov 6th 2008, 10:05 AM #3