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Index for Trigonometry
Math terminology from triangle trig, circle trig. Includes material about trig functions, their inverses, and trig identities.

Alpha (Α α)

Amplitude

Angle of Depression

Angle of Elevation

Anticlockwise

arccos

Arccos

arccosec

Arccosec

arccot

Arccot

arccsc

Arccsc

arcsec

Arcsec

arcsin

Arcsin

arctan

Arctan

Area of a Circle

Area of a Kite

Area of a Parallelogram

Area of a Regular Polygon

Area of a Rhombus

Area of a Sector of a Circle

Area of a Segment of a Circle

Area of a Triangle

Area of an Equilateral Triangle

Arm of an Angle

Asymptote

Bearing

Beta (Β β)

Central Angle

Circle Identities

Circle Trig Definitions

Circular Functions

Clockwise

Cofunction Identities

cos

cos-1

Cos-1

cosec

cosec-1

Cosec-1

cosecant

cosine

cot

cot-1

Cot-1

Cotangent

Coterminal

Counterclockwise

csc

csc-1

Csc-1

ctg

ctg-1

Ctg-1

Degree (angle measure)

Difference Identities


Double Angle Identities

Double Number Identities

Exact Values of Trig Functions

Frequency of a Periodic Function

Frequency of Periodic Motion

Gamma (Γ γ)

Greek Alphabet

Half Angle Identities

Half Number Identities

Heroís Formula

Heronís Formula

Identity (Equation)

Initial Side of an Angle

Inverse Cosecant

Inverse Cosine

Inverse Cotangent

Inverse Function

Inverse Secant

Inverse Sine

Inverse Tangent

Inverse Trig

Inverse Trig Functions

Inverse Trigonometry

Law of Cosines

Law of Sines

Measure of an Angle

Minute

Model

Odd/Even Identities

Omega (Ω ω)

Period of a Periodic Function

Period of Periodic Motion

Periodic Function

Periodic Motion

Periodicity Identities

Phase Shift

Phi (Φ φ)

Plus/Minus Identities

Product to Sum Identities

Psi (Ψ ψ)

Pythagorean Identities

Quadrantal Angle

Radian

Ratio Identities

Reciprocal Identities

Reference Angle

RPM

sec

sec-1

Sec-1

Secant (Trig Function)

Secant Line

Second

Sector of a Circle

Side of an Angle

Simple Harmonic Motion (SHM)

sin

sin-1

Sin-1

Sine


Sinusoid

SOHCAHTOA

Special Angles

Spherical Trigonometry

Standard Position

Sum/Difference Identities

Sum to Product Identities

tan

tan-1

Tan-1

Tangent (Trig Function)

Terminal Side of an Angle

Theta (Θ θ)

Triangulation

Trig

Trig Functions

Trig Identities

Trig Values of Special Angles

Trigonometry

Unit Circle

Unit Circle Trig Definitions

Wavelength


  this page updated 28-jul-14
Mathwords: Terms and Formulas from Algebra I to Calculus
written, illustrated, and webmastered by Bruce Simmons
NCTM Web Bytes December 2004 Web Bytes March 2005 Web Bytes