1.

Differentiate w.r.t. x: `(i)tan^(-1){sqrt((1+cosx)/(1-cosx))}" "(ii)tan^(-1){sqrt((1+sinx)/(1-sinx))}`A. `(x)/(2)`B. `(-x)/(2)`C. `(pi)/(2)+(x)/(2)`D. `(pi)/(2)-(x)/(2)`

Answer» Correct Answer - A


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