# Reciprocal Trigonometric Ratios

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## Name

Reciprocal trigonometric ratios
Figure Sides
$\text{Let the right triangle } OHA\,$

$O=\text{ side adjacent to angle }\theta\,$

$A=\text{ side opposite to angle }\theta\,$

$H=\text{ hypotenuse}\,$

Ratio Reciprocal ratio Formulas
$\sin \theta=\frac{O}{H}$ $\csc \theta=\frac{H}{O}$ $\frac{O}{H}\cdot\frac{H}{O}=1$ $\sin \theta\cdot\csc \theta=1$ $\sin \theta=\frac{1}{\csc \theta}$
$\cos \theta=\frac{A}{H}$ $\sec \theta=\frac{H}{A}$ $\frac{A}{H}\cdot\frac{H}{A}=1$ $\cos \theta\cdot\sec \theta=1$ $\cos \theta=\frac{1}{\sec \theta}$
$\tan \theta=\frac{O}{A}$ $\cot \theta=\frac{A}{O}$ $\frac{A}{H}\cdot\frac{H}{A}=1$ $\tan \theta\cdot\cot \theta=1$ $\tan \theta=\frac{1}{\cot \theta}$

## Usage

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## See Also

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# Web Resources

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