Q. 45.0( 6 Votes )

Choose the correc A.

B.

C.

D.

Answer :

Let f(x) = sec (tan–1 x)


Let θ = tan-1x


--(1)



-- From (1)


Now θ = tan-1x


= x = tan θ


sec2θ – tan2θ = 1


Putting values, we get




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