Question
Question: \(\int _ { 0 } ^ { 1 / 2 } \frac { x \sin ^ { - 1 } x } { \sqrt { 1 - x ^ { 2 } } } d x =\)...
∫01/21−x2xsin−1xdx=
A
21+123π
B
21−123π
C
21−123π
D
None of these
Answer
21−123π
Explanation
Solution
Put t=sin−1x⇒dt=1−x21dx then
=[−tcost+sint]0π/6
=[−6π⋅23+21]=[21−123π].