Hello. I am stuck at a point on this question.
Identify the maximum and minimum values of the function y = 10 cos x in the interval [-2π, 2π].
This is what I have so far (not much I know)
10 cos [-2π]=10
10 cos [2π]=10
f(x)=10 sin (x)
0=10 sin (x)
Nothing like the examples I was given in class so now I can't figure out what to do. Is anyone able to explain this to me please?