In Exercises 107–112, set your TI graphing calculator in parametric and degree modes...

In Exercises 107–112, set your TI graphing calculator in parametric and degree modes. Set the window and functions (see the third screen) as shown here, and graph. A circle of radius 1 will appear on the screen. Trace to move a short distance around the circle. In the screen, the point on the circle corresponds to an angle is X = 0.90630779, and is Y = 0.42261826.

For what angle