# Copy of Sin(x) & Unit Circle - Degrees

In this animation we plot . Here the label and unit on the in degrees. There is no unit on the is the

*horizontal*-axis is*y*-axis. The*y*-value of the sine function for the angle*y*-coordinate of the point T. (Remember: the*y*-value of the cosine function for this angle is the*x*-coordinate of the point T.)Move the slider to α=45°. The . Do you know the exact value of ?
Move the slider to α=135°. The . Do you know the exact value of ?
Now, let α=–45°. Move the slider to the corresponding angle between 0° and 360°. The . Do you know the exact value of ?
Does this agree with the fact that sin(–α)=–sin(α)?

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