Secant

### 1. Geometry

A secant is a line that intersects a circle at two points.
See Secant of a circle

### 2. Trigonometry

The secant of an angle in a right triangle is the hypotenuse divided by the adjacent side. See Secant of an angle - trigonometry.

## Pages referring to 'secant'

This page explores the derivatives of trigonometric functions in calculus. Interactive calculus applet.
Definition and properties of a chord - a line segment that joins two points on the circumference of a circle
The angle made by two secants that intersect outside a circle is half the difference between the intercepted arc measures.
States: When two secant lines intersect each other outside a circle, the products of their segments are equal.
Introduction to the 6 trigonometry functions - sine, cosine, tangent, secant, cosecant, cotangent
A pictorial index to the parts of a circle. A diagram with links to full definitions.
Definition of secant function in trigonometry as applied to right triangles
Definition and properties of a secant - a line that intersects a circle at two points