Evaluate the following:

Question

Philoid · Accepted Answer

Given:

Let

Using the property:

⇒

Adding equation (1) and (2)

⇒

⇒ Put 2x=t

⇒ 2xdx=dt

⇒

⇒ As cos(-x) = cos x

Using property:

⇒

Using the property:

⇒

⇒ Now From previous question eq.(7) we obtained

⇒