Question

What is the period of the sinusoid given by y=-3cos(2pi/5x)? Is it 2/5? Please explain.

Answer 1

Explanation:

the answer was 5. apex

Answer 2

y = a sin b x
amplitude = a
period = 2π /b.

y = 6 sin x
a = 6
b = 1

a, the amplitude, represents the highest point a graph reaches;
a = 6

The period represents the length of a cycle-
the period = 2π /b = 2π/1 = 2π