(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

[tex]\int_{\frac{5\pi}{6}}^{\pi}\frac{\cos^{4}x}{\sqrt{1-\sin{x}}}dx[/tex]

2. Relevant equations

[tex]\cos^{2}x=\frac{1+\cos{2x}}{2}[/tex]

3. The attempt at a solution

i used the above equation, then expanded it all out and multiplied by the denominator and hoped i would then be able to do a simple substitution that would give me an antiderivative after integrating but that hasn't been working for me

any ideas?

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# Help with trigonometric integral

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