2 \sec ^{2} \theta-\sec ^{4} \theta-2 \csc ^{2} \theta+\csc ^{4} \thet – InterviewSolution

1.	2 \sec ^{2} \theta-\sec ^{4} \theta-2 \csc ^{2} \theta+\csc ^{4} \theta=\cot ^{4} \theta-\tan ^{4} \theta
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