# How do I solve the following equation?

$$4\sin(x)^4+2\sin(x)^2-2\sin(x)-1=0$$

I've tried over and over but I can't seem to get the answer, thanks for the help.

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 This doesn't factor easily. Alpha only finds approximate roots. – Ross Millikan Feb 28 at 1:09 It is an equation that could come up in "real life," but probably not in a "made up" problem. Is this the problem you were given? – André Nicolas Feb 28 at 1:12 Yeah, it is a problem that my teacher made up – RunnerGotGame Feb 28 at 1:19 The equation can be solved exactly, but the roots turn out quite ugly. – vonbrand Feb 28 at 1:30 RunnerGotGame: apologies for oversimplifying the problem, and jumping the gun with a trivial, unhelpful "hint"! – amWhy Feb 28 at 1:33
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