# secant

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Related to secant: cosecant

## secant,

in mathematics.**1**In geometry, a secant is a straight line cutting a curve or surface. If it intersects the curve in two different points, as in the secant of a circle

**circle,**

closed plane curve consisting of all points at a given distance from some fixed point, called the center. A circle is a conic section cut by a plane perpendicular to the axis of the cone.

**.....**Click the link for more information. , the segment of the secant between the points is called a chord. The limiting position of a secant, if such a limit exists, is called the tangent

**tangent,**

in mathematics.

**1**In geometry, the tangent to a circle or sphere is a straight line that intersects the circle or sphere in one and only one point. For other curves and surfaces the tangent line at a given point

*P*

**.....**Click the link for more information. to the curve or surface at that point.

**2**A trigonometric function. See trigonometry

**trigonometry**

[Gr.,=measurement of triangles], a specialized area of geometry concerned with the properties of and relations among the parts of a triangle. Spherical trigonometry is concerned with the study of triangles on the surface of a sphere rather than in the plane; it is

**.....**Click the link for more information. .

## Secant

a trigonometric function. In a right triangle, the secant of an acute angle is defined as the ratio of the hypotenuse to the leg adjacent to the angle. The secant is denoted by *sec.*

## secant

[′sē‚kant] (mathematics)

The function given by the reciprocal of the cosine function. Abreviated sec.

The secant of an angle

*A*is 1/cos*A*.A line of unlimited length that intersects a given curve.

## secant

**1.**(of an angle) a trigonometric function that in a right-angled triangle is the ratio of the length of the hypotenuse to that of the adjacent side; the reciprocal of cosine

**2.**a line that intersects a curve