- 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*) = *e*^{x}

- 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