14.1. Elementary functions

The following elementary mathematical functions are implemented:and work on scalar expressions and numbers.

Table 14.1 Elementary mathematical functions
`square_root(x,[d=2])`	\(d\)-th root \(\sqrt[d]{x}\)
`exp(x)`	Exponential function \(\exp(x)\)
`log(x)`	Natural logarithm \(\log(x)\)
`sin(x)`	Sine \(\sin(x)\)
`cos(x)`	Cosine \(\cos(x)\)
`tan(x)`	Tangent \(\tan(x)\)
`asin(x)`	Inverse sine \(\operatorname{asin}(x)\)
`acos(x)`	Inverse cosine \(\operatorname{acos}(x)\)
`atan(x)`	Inverse tangent \(\operatorname{atan}(x)\)
`atan2(y,x)`	Inverse tangent with case distinguishment \(\operatorname{atan2}(y,x)\)
`sinh(x)`	Hyperbolic sine \(\sinh(x)\)
`cosh(x)`	Hyperbolic cosine \(\cosh(x)\)
`tanh(x)`	Hyperbolic tangent \(\tanh(x)\)

Further functions can be implemented using the CustomMathExpression class from the module pyoomph.expressions.cb, see Section 3.10.