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Prove that 1 + {Cot^2A/(1 + CosecA)} = CosecA
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Prove that 1 + {Cot^2A/(1 + CosecA)} = CosecA
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Prove that `1/(tan3A-tana)-1/(cot3A-cotA)=cot2A`
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`((1+tan^2A)/(1+cot^2A))=((1-tanA)/(1-cotA))^2=tan^2A`
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prove that (1+1/tan2a)(1+1/cot2a)=1/sin2a-sin4a.(1+1/tan^2a)(1+1/cot^2a)=1/sin^2a-sin^4a.
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