Understanding sine, cosine, and tangent is easier when you use the unit circle. Let’s break it down:

• What is the Unit Circle?
  The unit circle is a circle that has a radius of 1. It’s centered right at the point (0,0) on a graph.

• Sine and Cosine:
  When you look at an angle called $\theta$, the x-coordinate of that angle on the circle tells you the value of $\cos(\theta)$.
  The y-coordinate gives you the value of $\sin(\theta)$.

• Tangent:
  You can think of tangent as the relationship between sine and cosine.
  This means that $\tan(\theta)$ is found by dividing the y-coordinate (sine) by the x-coordinate (cosine). So, it looks like this:
  $\tan(\theta) = \frac{\sin(\theta)}{\cos(\theta)}$.

Using the unit circle is a simple and clear way to understand these important math concepts!