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(Cosec a -cot a)^2=1-cos\1+cos
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(Cosec a -cot a)^2=1-cos\1+cos

User Framontb
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4 votes

Answer:

Explanation:


\displaystyle\\(cosec \alpha -cot\alpha )^2=\\\\((1)/(sin\alpha ) -(cos\alpha )/(sin\alpha ))^2 =\\\\((1-cos\alpha )/(sin\alpha ) )^2=\\\\((1-cos\alpha)^2 )/(sin^2\alpha )=\\\\ ((1-cos\alpha )^2)/(1-cos^2\alpha ) =\\\\((1-cos\alpha )^2)/((1+cos\alpha )(1-cos\alpha )) =\\\\(1-cos\alpha )/(1+cos\alpha )

User Conio
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