Question

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

a) the cosine function is odd, so it is symmetrical across the origin

b) cos(x) = cos(-x)

c) cos(x) = -cos(x)

d) Since the cosine function is even, reflection over the x axis does not change the graph.

Answer 1

plz help

Answer 2

@KyanTheDoodle

Answer 3

Cosine is even, and for even functions f(x) = f(-x)