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(1+tanA)^2+(1-tanA)^2=2sec^2A...

`(1+tanA)^2+(1-tanA)^2=2sec^2A`

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Prove that (1+tanA)^(2)+(1-tanA)^(2)=2sec^(2)A .

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Prove the following: (1+tanAtanB)^2+(tanA-tanB)^2=sec^2Asec^2B

Prove that (1+tan(A/2))/(1-tan(A/2))=secA+tanA

prove that ((1-tanA)/(1-cotA))^2=tan^2A

Prove that (1+tanA)^2-sec^2A)cotA=2