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\frac{1 - \cos {}^(4) ( \beta ) }{ \sin {}^(4) ( { \beta }^{} ) } = 1 + 2 \cot {}^(2) ( \beta )

Please Prove This Problem By Doing in LHS side. I try my best but i couldn't solve this. so please solve it.


User Aghd
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Answer:

Explanation:

User Israelm
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