Given Definite Integral can be written as:

Let us assume y = sinx,

Differentiating on both sides w.r.t x we get,

⇒ d(y) = d(sinx)

⇒ dy = cosxdx……(2)

Upper limit for the Definite Integral:

⇒ y = 1……(3)

Lower limit for the Definite Integral:

⇒ x = 0 ⇒ y = sin(0)

⇒ y = 0……(4)

Substituting (2),(3),(4) in the eq(1) we get,

We know that:

We know that:

[here f’(x) is derivative of f(x))