Alphabetic list of built-in functions

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abs
absolute value

acos
arccosine (the inverse of the cosine - produces such angle that the cosine of it has the given value)

acosh
inverse hyperbolic cosine

asin
arcsine

asinh
inverse hyperbolic sine

atan or atg
arctangent

atan2 or atg2
arctangent that takes two arguments: atan2(y, x) denotes arctangent of y/x. The signs of arguments y and x are taken into account, so that a result in the range -π/2 through π/2 is produced.

atanh or atgh
inverse hyperbolic tangent

besj0, besj1, besy0, besy1
Bessel functions J0, J1, Y0, Y1 (they take argument always in radians, regardlessly of the selected angle unit)

ceil
round to the nearest integer greater or equal to the given value

cos
cosine

cosh
hyperbolic cosine

cot
cotangent? no such function here! Make use of the fact that cot(x) = 1 / tan(x)

erf
Gauss error function

erfc
complementary error function erfc(x) = 1 - erf(x)

exp
exponential function, exp(x) = ex

floor
round to the nearest integer less or equal to the given value

gamma
gamma function

inverf
Inverse function of the error function erf

invnorm
Inverse function of the cumulative Gaussian distribution function

ln
Natural logarithm (to the base e)

log
Common logarithm (to the base 10)

norm
Cumulative Gaussian distribution function (probability that a random variable will be less or equal to the given value)

sgn
Sign of a number - for negative numbers it is -1, for zero 0, for positive numbers +1

sin
sine

sinh
hyperbolic sine

sqrt
square root

tan or tg
tangent

tanh or tgh
hyperbolic tangent

Grapher - basic version

Grapher - advanced version