What is the period of the function

Y = 3 cos Pi x

A. Pi

B. 2Pi

C. 2

D. 1

The general form of the cosine function is:

y = a cos (b (x-c)) + d

The period of such function can be calculated using the following rule:

period = 2 п / b

Comparing the general form with the given equation, we will find that:

b = п

Substituting with the given b in the above equation, we can evaluate the period as follows:

period = 2 п / b = 2 п / п = 2

Therefore, the period of the given equation is 2