# The unit circle definition of sine, cosine, and tangent

### Practice

Trig values of special anglesGet 3 of 4 questions to level up!

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# The unit circle definition of sine, cosine, and tangent

### Practice

### About this unit

Learn how the trigonometric ratios are extended to all real numbers using algebra. Start solving simple problems that involve this new definition of the trigonometric functions.

Trig values of special anglesGet 3 of 4 questions to level up!