# 1.21: Reciprocal Identities

Difficulty Level: At Grade Created by: CK-12
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Practice Reciprocal Identities

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Estimated4 minsto complete
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Estimated4 minsto complete
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MEMORY METER
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### Vocabulary Language: English

TermDefinition
domain The domain of a function is the set of $x$-values for which the function is defined.
Range The range of a function is the set of $y$ values for which the function is defined.
Reciprocal Trig Function A reciprocal trigonometric function is a function that is the reciprocal of a typical trigonometric function. For example, since $\sin x = \frac{opposite}{hypotenuse}$, the reciprocal function is $\csc x = \frac{hypotenuse}{opposite}$

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