`int_(0)^(1) sqrt((1-x)/(1+x)) dx=?`A. `(pi)/(2)+1`B. `(pi)/(2) -1`C. None of theseD.

`int_(0)^(1) sqrt((1-x)/(1+x)) dx=?`A. `(pi)/(2)+1`B. `(pi)/(2) -1`C.

1.	`int_(0)^(1) sqrt((1-x)/(1+x)) dx=?`A. `(pi)/(2)+1`B. `(pi)/(2) -1`C. None of theseD.
Answer» Correct Answer - C