The Unit Circle Definition of Trigonometric FunctionVideos, worksheets, games and acivities to help Algebra 1I students learn the unit circle definition of trigonometric function.
The Definitions of Sine and Cosine : The right triangle definitions of sine and cosine only apply to acute angles, so a more complete definition is needed. The point where the terminal side intersects the unit circle (x, y) is the basis for this definition. Since the radius (and therefore hypotenuse of the right triangle) is 1, the denominators cosine=adjacent/hypotenuse and sine=opposite/hypotenuse are also 1. Thus, the sine definition is y=sine and x=cosine.
Unit Circle Definition of Trig Functions Using the unit circle to define the sine, cosine, and tangent functions
The unit circle definition of trigonometric function Using the unit circle to extend the SOH CAH TOA definition of the basic trigonometric functions.
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