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cos(tan^(-1)3/4)+cos(tan^(-1)x) is equal...

`cos(tan^(-1)3/4)+cos(tan^(-1)x)` is equal to

A

`4/5+x/sqrt(1+x^2)`

B

`3/5+1/sqrt(1+x^2)`

C

`4/5+1/sqrt(1+x^2)`

D

`3/5+x/sqrt(1+x^2)`

Text Solution

Verified by Experts

The correct Answer is:
C
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