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.
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
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