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Prove that : "tan"(pi/(4)+1/(2)"cos"^(-1...

Prove that : `"tan"(pi/(4)+1/(2)"cos"^(-1)a/(b))+"tan"(pi/(4)-1/(2)"cos"^(-1)a/(b))=(2b)/(a)`.

A

`(2a)/b`

B

`(2b)/a`

C

`a/b`

D

`b/a`.

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