The Unit Circle - Precalculus Review Calculus Preview

unit circle  Using the unit circle, the sine of an angle t equals the y-value of the endpoint on the unit circle of an arc of length t whereas the cosine of A unit circle is a circle of unit radius, , of radius 1 The unit circle plays a significant role in a number of different areas of mathematics

For instance, you want to find x degrees on a unit circle, where x is greater than or equal to 360° We know that there are 360° in a unit circle, so you can We can use coordinates to describe any point along the outer edge of the circle The x value or x-coordinate represents the distance

MIT grad shows how to remember the unit circle angles and points The cos value is the first We will use these coordinates in later sections to find trigonometric functions of special angles on the unit circle x 1 1 45o 2 2