Q. 28

Mark the Correct alternative in the following:

If tan x = t then tan 2x + sec 2x is equal to

A.

B.

C.

D.

Answer :

Given tan x = t


then tan 2x + sex 2x =


[ using the formulae for tan 2x and sec 2x in terms of tan x,


and ]


Now






As already given tan x = t



Hence the answer is option A.

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