Q. 145.0( 2 Votes )

Choose the correc A. 1/2

B. x

C.

D. 1

Answer :

We are given that




Now, we know



Now,



Put x = tan θ


θ = tan-1x ----(1)






Again



Put x = tan θ


θ = tan-1x ----(1)





-- From (1)


Now,


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