Question

For every (x, y) coordinate on the unit circle, x = ? (∅).

a) x = ∅
b) x = 1
c) x = 0
d) x = π

Answer 1

The x-coordinate on the unit circle is equal to the cosine of the angle (∅).

Step-by-step explanation:

In the unit circle, x represents the cosine of the angle (∅). So for every (x, y) coordinate on the unit circle, x = cos(∅).

For example, if the angle (∅) is 0 degrees, then x = cos(0) = 1. If the angle (∅) is 90 degrees, then x = cos(90) = 0. And if the angle (∅) is 180 degrees, then x = cos(180) = -1.

Therefore, the correct answer is a) x = cos(∅).