Question

Find a positive angle less than one rotation that is co terminal with -(4pi / 3)

Answer 1

I'd suggest you draw the given angle, -(4pi/3), first. Hint: It'll be in the 2nd quadrant. Now try to determine, visually, what the corresponding positive angle is.

Mathematically, you could obtain this positive angle by combining 2pi with -(4pi/3).

Of course, your two results must be the same.

Answer 2

Thanks. I got it.