Ask Me Help Desk - Do this for my cal class

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do this for my cal class

I NEED to do this for my cal class...

this is the problem,

Solve the equation for values of x. 0 ≤ x <2(pi):
sin(x)=1-2sin^2x

Rewrite as

$2sin^{2}(x)+sin(x)-1=0$

Now, let $u=sin(x)$ and get the quadratic:

$2u^{2}+u-1=0$

Now, solve the quadratic and resub.

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