1.

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

Answer» Correct Answer - C


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