Evaluate the following integrals:
It is know that sin-1x+cos-1x = π/2
Tip – If f1(x) and f2(x) are two functions , then an integral of the form can be INTEGRATED BY PARTS as
where f1(x) and f2(x) are the first and second functions respectively.
Now, for the first term,
Taking f1(x) = sin-1√x and f2(x) = 1,
Taking (1-x)=a2,
-dx=2ada i.e. dx=-2ada
Again, x=1-a2
Replacing the value of a, we get,
The total integration yields as
, where c’ is the integrating constant
For the second term,
Taking f1(x) = cos-1√x and f2(x) = 1,
Taking (1-x)=a2,
-dx=2ada i.e. dx=-2ada
Again, x=1-a2
Replacing the value of a, we get,
The total integration yields as
, where c’’ is the integrating constant
where c is the integrating constant