Radians and the Unit Circle

Radians are a unit of measure for rotations commonly used in Trigonometry.  In short, a radian is a distance along a circumference of a circle, equal to the length of the radius. 

To learn about radians, especially how to convert between radians and degrees, and degrees and radians, and to learn some short cuts to help you remember how to fill out a unit circle in radians, please use the tabs below.  Begin with the first tab, which contains notes and explanations.  The video might help provide clarity.  Download and play the PowerPoint, then try the assignment.  This should help you establish a solid foundation with radians.

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