The functions (also called the circular functions) comprising trigonometry: the cosecant 
,
cosine 
, cotangent 
, secant 
, sine 
, and tangent 
. However, other notations are sometimes used, as summarized
in the following table.
 | alternate notations |
 | 
(Erdélyi et al. 1981, p. 7),  (Gradshteyn and Ryzhik 2000, p. xxix) |
 |  (Gradshteyn and Ryzhik 2000, p. xxvii) |
 |  (Gradshteyn and Ryzhik 2000, p. xxix) |
The inverses of these functions (the inverse trigonometric functions) are denoted 
, 
, 
, 
, 
, and 
. Note that the 
notation here means inverse
function, not 
to the 
power.
See also
Double-Angle Formulas,
Half-Angle Formulas,
Hyperbolic
Functions,
Inverse Trigonometric
Functions,
SOHCAHTOA,
Trigonometry
Angles,
Trigonometry,
Unit
Circle
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References
Erdélyi, A.; Magnus, W.; Oberhettinger, F.; and Tricomi, F. G. Higher
Transcendental Functions, Vol. 1. New York: Krieger, p. 6, 1981.Feynman,
R. P. "A Different Set of Tools." In 'Surely
You're Joking, Mr. Feynman!': Adventures of a Curious Character. New York:
W. W. Norton, 1997.Gradshteyn, I. S. and Ryzhik, I. M.
Tables
of Integrals, Series, and Products, 6th ed. San Diego, CA: Academic Press,
2000.Referenced on Wolfram|Alpha
Trigonometric Functions
Cite this as:
Weisstein, Eric W. "Trigonometric Functions."
From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/TrigonometricFunctions.html
Subject classifications
