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(Solved): pls with process \( \tan ^{2} \delta \cos ^{2} \delta=1-\cot ^{2}(-\delta) \sin ^{2}(-\delta) \) ...



pls with process

\( \tan ^{2} \delta \cos ^{2} \delta=1-\cot ^{2}(-\delta) \sin ^{2}(-\delta) \)
\( \tan ^{2} \delta \cos ^{2} \delta=1-\cot ^{2}(-\delta) \sin ^{2}(-\delta) \)


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R.H.S 1?cot2(??)sin2(??) =1?cos
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