What is the equivalent expression for cot(x)?

The cotangent function, denoted as cot(x), is defined as the ratio of the adjacent side to the opposite side in a right triangle. In terms of the sine and cosine functions, cotangent can also be expressed as the cosine of x divided by the sine of x. Therefore, cot(x) is equal to cos(x)/sin(x).

This fundamental relationship stems from the definitions of sine and cosine in the context of a right triangle or the unit circle. Sine corresponds to the y-coordinate (opposite side) and cosine corresponds to the x-coordinate (adjacent side). By expressing cotangent as the ratio of these two functions, we find that cot(x) = cos(x)/sin(x).

Other options represent different trigonometric identities or functions but do not define cotangent correctly. Thus, the correct equivalent for cot(x) is indeed cos(x)/sin(x).