# Evaluate the integral. {eq}\int_{0}^{\pi/2} \cos^2 \theta \, \mathrm{d}\theta {/eq}

## Question:

Evaluate the integral.

{eq}\int_{0}^{\pi/2} \cos^2 \theta \, \mathrm{d}\theta {/eq}

## Definite Integral:

In mathematics, two types of integration can be observed. One is with a boundary (lower limit and upper limit) and another one is without any boundary. Here, the integration with boundary is defined as definite integral, and the integration without boundary is defined as indefinite integral.