<span>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]</span>
