Question

Find the reference angle. St 47 23 to

Answer 1

Given the angle

$-\frac{5\pi}{4}$

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

so, the angle will be:

$-\frac{5\pi}{4}+2\pi=\frac{3\pi}{4}$

So, the angle Lies in the second quadrant

so, the reference angle will be:

$\pi-\frac{3\pi}{4}=\frac{\pi}{4}$

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