Unit Circle Diagram Trigonometry. Sine cosine and tangent. As illustrated in the following diagram.
You can use it to explain all possible measures of angles from 0 degrees to 360 degrees. Because the radius of the unit circle is 1 we will see that it provides a convenient framework within which we can apply trigonometry to the coordinate plane. For a given angle θ each ratio stays the same no matter how big or small the triangle is.
In a circle or on a graph.
We have previously applied trigonometry to triangles that were drawn with no reference to any coordinate system. A diagram of the unit circle is shown below. As illustrated in the following diagram. The equation of this circle is xy22 1.
