Which angle below is coterminal to 3 pie over 4

Question

Which angle below is coterminal to 3 pie over 4

Answer 1

There are two answers that I would show:

Positive co terminal will be the angle in radians that will add up to 2Π radians or 

2∏ - 3∏/4 = 5∏/4

or the negative co terminal that will be the same angle but with negative sign,