Question

What is the period of the function?
y=2 cos (pi)(x)

Answer 1

The of a sine or Cosine function is always 2pi divided by the absolute value if the term the variable inside the function is being multiplied by. In this case the term that x is being multiplied by is pi so the period is 2pi divided by pi which is 2.

Answer 2

"The period of "was what I meant at the start