Q. 40

Prove that: tan x

Answer :

Formula :

Put 3 x = x + 2 x

Taking tan on both the sides we get,

tan (3 x ) = tan (x + 2 x)

Applying the formula we get,

Cross Multiplying we get,

Tan 3 x – tan x tan 2x tan 3x = tan x + tan 2x

Tan x + tan 2x + tan 3x = tan x tan 2x tan 3x

Hence, Proved.

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