Question

what is the period of the function?
y = 4 cos pi x

Answer 1

The period of the function y = 4 cos(pi x) is 2 because the general formula for the period of a cosine function is T = 2π / |b|, where b is the coefficient of x in the cosine function. In this case, the coefficient of x is pi, so the period is T = 2π / |pi| = 2π / pi = 2.