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education/math/MATH1060 (trig)/The Unit Circle.md
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# Introduction # Introduction
The unit circle has a center a $(0, 0)$, and a radius of $1$ with no defined unit. The unit circle has a center a $(0, 0)$, and a radius of $1$ with no defined unit.
Sine and cosine can be used to find the coordinates of specific points on the unit circle.
**Sine likes $y$, and cosine likes $x$.**
When sine is positive, the $y$ value is positive. When $x$ is positive, the cosine is positive.
$$ cos\
# Definitions # Definitions
| Term | Description | | Term | Description |
| ---- | ----------- | | ---------------- | ----------------------------------------------------------------------------- |
| | | | $\theta$ (theta) | Theta refers to the angle measure in a unit circle. |
| $s$ | $s$ is used to the length of the arc created by angle $\theta$ on the circle. |