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secant – trigonometry
secant
Geometry: A line connecting two points on a curve.
 Trigonometry: A periodic trigonometric function defined on angles, usually abbreviated “sec.” It is the multiplicative inverse of the cosine function.
See the related article for a complete exposition.
Related article: Trig Functions and Identities
sin
See sine.
sine
ARTICLE
A periodic trigonometric function defined on angles. Usually abbreviated “sin.”
See the article for a complete exposition.
Cf. tangent, cosine.
tan
See tangent.
tangent
Geometry: A tangent to a curve at a point P is the straight line through P whose slope is equal to the slope of the curve at P.
Trigonometry: A periodic trigonometric function defined on angles, usually abbreviated “tan.” Can be defined independently or in terms of the trig functions sine and cosine.
See the related article for a complete exposition.
Related article: Trig Functions and Identities
trigonometric function
The “trig” functions are transcendental functions defined on angles. They include the sine, cosine, tangent, secant, cosecant, and cotangent functions. See the related article for a complete description.
Related article: Trig Functions and Identities
trigonometric identity
ARTICLE
An established rule for manipulating trigonometric expressions. See the article for a comprehensive listing.
trigonometry
The mathematical subject concerned with trigonometric functions, which are defined on angles. They include the sine, cosine, tangent, secant, cosecant, and cotangent functions.
Related article: Trig Functions and Identities
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