I've been working on a problem and Im stuck here: 2(cos(x))^2 + sin(x) - 1 = 0 I just can't figure out how to factor this any further, any help would be appreciated
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Originally Posted by maryanna91 I've been working on a problem and Im stuck here: 2(cos(x))^2 + sin(x) - 1 = 0 I just can't figure out how to factor this any further, any help would be appreciated $\displaystyle 2(1 - \sin^2{x}) + \sin{x} - 1 = 0$ $\displaystyle 2 - 2\sin^2{x} + \sin{x} - 1 = 0$ $\displaystyle 1 + \sin{x} - 2\sin^2{x} = 0$ factor and finish ...
Thanks a lot!
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