Question

Identify the maximum and minimum values of the function y = 3 cos x in the interval [-2π, 2π

Answer 1

@lebronjames -- Welcome to open study! :D Do you happen to have a graphing calculator available?

Answer 2

yes but my teacher dosent want us to use a calculator

Answer 3

You want to find the amplitude of the function, so the "a" value. Here, a=3. So the highest it goes is 3 and the lowest is -3

Answer 4

so the maximum is (3,-2.9) and the minimum is (-3,2.9)