Posted by **George** on Friday, January 15, 2010 at 1:03am.

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

- Find all solutions in the interval [0, 2pi)

I got pi/2 but the answer says {0, pi/2, pi}

Where does 0 and pi come from for solutions? When simplifying I just get sin(x)=1

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