Question

identify the maximum and minimum values of the function y = 3 cos x in the interval [-2π, 2π]. Use your understanding of transformations, not your graphing calculator.

Answer 1

the max value of cosx is 1, therefore the max value for y =3 cosx is
3 * 1 = 3

Answer 2

and the min value of cosx is - 1, therefore the min value for y =3 cosx is
3 * -1 = -3