I have to make a video explaining this problem, sent by the person who hired me, but it doesn't appear to be correct.

What is the value of cos( + 301/2)?

A.-1/2

B. 1

C. 0

D. 1/2

E 3/2

This is the solution given:

cos(+301/2) = cos(+75*2+ /2)= cos(+ /2)

= 0

Ans: C

When I use degrees = radians * 180/pi, that answer isn't correct. And when I plug in the original cos (pi+301pi/2) into google calculator, it isn't 0.

Am I missing something?