Question

Where are the x-intercepts for f(x) = 4 cos(2x − π) from x = 0 to x = 2π?

Answer 1

x = 3 pi over 4, x = 5 pi over 4

x = pi over 2, x = 3 pi over 2

x = 3 pi over 4, x = 5 pi over 4, x = 7 pi over 4

x = pi over 2, x = 3 pi over 2, x = 5 pi over 2