Question

What is one characteristic of the cosine function? It is an odd function. It has a period equal to π. Its graph is symmetric about the y-axis. Its domain is between –1 and 1 and is inclusive.

Answer 1

C. Its graph is symmetric about the y-axis.

Explanation:

If you graph on desmos it shows that it is symmetric about the y-axis :)

Answer 2

D) its domain is between -1 and 1

Explanation:

cos is actually an even function, and it has a period of 2π.

Sine has a graph symmetric about the y-axis, not cosine.