The Fundamental Theorem of Calculus: Suppose f is continuous on [a, b], then
∫abfxdx=Fb-F(a), where F is antiderivative of f, that is F'=f.
Applying the formula in the above equation ant derivative of 11-x2 is (sin-1x).
Thus using the Fundamental theorem of Calculus
Now, substituting the values for sin-112 and sin-112,
Simplifying the equation gives