Sketch the angle then find its reference angle (13\pi)/(4)

Question

Sketch the angle then find its reference angle
`(13\pi)/(4)`

Answer 1

We need to find the reference angle by sketching the angle:

First, we need to subtract it by 2π, then:

`θ=(13\pi)/(4)-2\pi=(5)/(4)\pi`

Hence, the reference angle is 5π / 4.