Proved that2 \sin ^{2} \frac{\pi}{6}+\csc \frac{7 \pi}{6} \cos ^{2} \f – InterviewSolution

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1.	Proved that2 \sin ^{2} \frac{\pi}{6}+\csc \frac{7 \pi}{6} \cos ^{2} \frac{\pi}{3}=0
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