Which statement regarding the sinusoidal functions, sine and cosine, is true?
O
A. The cosine function can be flipped over the x-axis without change.
O
B. Since sine is an odd function, sin(-x) = -sin(x).
O
C. The sin function can be flipped over without change to either the x-
axis or y-axis.
O
D. Since cos is an even function, cos(-x) = -cos(x).