function of an angle / From Wikipedia, the free encyclopedia
In mathematics, the trigonometric functions are a set of functions which relate angles to the sides of a right triangle. There are many trigonometric functions, the 3 most common being sine, cosine, tangent, followed by cotangent, secant and cosecant.[1][2] The last three are called reciprocal trigonometric functions, because they act as the reciprocals of other functions. Secant and cosecant are rarely used.
Function
Abbreviation
Relation (Radians)
Sine
sin
Cosine
cos
Tangent
tan (or tg)
Cotangent
cot (or ctg)
Secant
sec
Cosecant
csc (or cosec)
All of the trigonometric functions of any angle can be constructed using a circle centered at O with radius of 1.Trigonometric functions:
Sine,
Cosine,
Tangent,
Cosecant,
Secant,
Cotangent