Question

Find the reference angle. St 47 23 to

Answer 1

Given the angle

`-(5\pi)/(4)`

Add 2π to the angle to find the corresponding positive angle

so, the angle will be:

`-(5\pi)/(4)+2\pi=(3\pi)/(4)`

So, the angle Lies in the second quadrant

so, the reference angle will be:

`\pi-(3\pi)/(4)=(\pi)/(4)`

so, the answer will be the reference angle = π/4