How to Create a Table of Trigonometry Functions
How to Calculate Trigonometry Functions Using Any Circle
The Cosecant and Secant Functions

The Secant Function

The secant function, abbreviated sec, is called a reciprocal function because it uses the reciprocal of the trig function, cosine. The secant function uses the ratio

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Just as with the cosecant, the ratio of the sides is greater than 1.

A right triangle with sides 5, 12, and 13.
A right triangle with sides 5, 12, and 13.

Using the triangle in the above figure, the two secants are

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Domain and Range of Tangent and Cotangent Trigonometry Functions
How to Calculate Trigonometry Functions of Angles Using the Unit Circle
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How to Remember the Ratios for the Three Basic Trig Functions
The Sine Function: Opposite over Hypotenuse
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