March 6, 2015

Homework Help: math

Posted by alex on Monday, April 7, 2008 at 9:02am.

the problem is
2cos^2x + sinx-1=0

the directions are to "use an identity to solve each equation on the interval [0,2pi).

This is what i've done so far:



cos2x + sinx =0

1 - 2sin^2x + sinx = 0



I think i'm supposed to factor it next but i'm not sure?


would doing that step be correct?

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