*\(\large Sin \theta+Sin^{2} \theta+Sin^{3} \theta=1\)*

Find the value of

*\(\large Cos^{6} \theta-4Cos^{4} \theta+8Cos^{2} \theta\)*

Thanks!!

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## Comments

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TopNewestThere's no "nice" solution. You can determine the value of \(\cos^2\theta\) by squaring the first equation and solve the quartic equation, but the final value does not have a nice form.

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I'm sorry !I think the question was wrongly printed in my book!! I searched and found that its Cos^6theta-4Cos⁴+8Cos²!!

Thanks for your reply!

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