Question

Needing help on part 2 Question is in the image

Answer 1

Notice that:

$\frac{13}{2}\pi=6\pi+\frac{1}{2}\pi=8\pi-\frac{3}{2}\pi.$

Therefore, the given angle is coterminal with:

$-\frac{3}{2}\pi.$

Answer:

$-\frac{3}{2}\pi.$