2 \cos ( \omega ) - \sec ( \omega ) \tan ( \omega ) d \omega
Evaluate
-\frac{d\omega \tan(\omega )}{\cos(\omega )}+2\cos(\omega )
Factor
\frac{-d\omega \sin(\omega )+2\left(\cos(\omega )\right)^{3}}{\left(\cos(\omega )\right)^{2}}
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