Trigonometric Functions

Trigonometric Functions
Function (abbreviation)DefinitionFormula
sine (sin)opposite / hypotenusesin A =  a\\overc
cosine (cos)adjacent / hypotenusecos A =  b\\overc
tangent (tan)opposite / adjacenttan A =  a\\overb
cotangent (cot or ctn)adjacent / oppositecot A =  b\\overa
secant (sec)hypotenuse / adjacentsec A =  c\\overb
cosecant (csc)hypotenuse / oppositecsc A =  c\\overa

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

See more Encyclopedia articles on: Mathematics

Browse By Subject

Play Poptropica Worlds

Download Poptropica and play for free!

Explore a limitless universe of uncharted islands
App store
Google Play