<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>
(-12)1 because of how you break it down
I cannot understand what you are saying
If the circumference of a circle is changed from 9 cm to 3 cm, then the diameter decreases by a factor of 3.