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" 3.Prove that ":quad sec^(2)(tan^(-1)2)...

" 3.Prove that ":quad sec^(2)(tan^(-1)2)+cosec^(2)(cot^(-1)3)=15

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sec^(2)(tan^(-1)4)+cosec^(2)(cot^(-1)3) =

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Prove that : sec^2 (tan^(-1)2) + cosec^2 (cot^(-1) 3) = 15

Prove that: sec^(2) (tan^(-1)√3) + "cosec"^(2)(cot^(-1)√3)=8 .