Sine Box



Sine Function

The figure shows a definition of sine function.
The unit circle is the circle with its center at the origin and a radius of 1. Angle x is formed by rotating OA about the origin to OP. Then the y-coordinate of point P is sin x.

Applet

Input an angle (degrees), then press enter key or click "Start" button.

Activity

Using the applet, find angle x that satisfies
  1. sin x=0.766
  2. sin x=-0.34
  3. sin x=0.50
  4. sin x=-0.80