Question

Which statement regarding the function y=cos(x) is true?

Answer 1

Cos(x)=cos(-x)-For apex people who are trying to make sure.

Answer 2

A. cos(x) = cos(-x)  [correct, since cos(x) is an even function]
B. Since the cosine function is even, reflection over the x-axis [y-axis] does not change the graph.  [false]
C. cos(x) = -cos(x)   [ false]
D. The cosine function is odd [even], so it is symmetrical across the origin.   [false]