Hey guys, I’m working on this question here
The gradient of the curve y=cos2x when x=15 is:
The options are
-pi/180
-1
pi(sqrt(3))
1
I differentiated it, substituted 15 in and I got -1. For some reason it’s saying this is incorrect but I don’t see how. The question specifies that this is in degrees and not radians btw.