# Functions in Expressions

View the list of available functions in CADFEKOPOSTFEKO.

 sincos tan cot Trigonometric functions (arguments expected in radians). arcsinarccos arctan arccot Trigonometric inverse functions (results in radians). eps0 The permittivity of free space in F/m. atan2 atan2(y,x) yields arctan(y/x) in the range - $\pi$ ... $\pi$ . pi The mathematical constant $\pi$ (Ludolph’s number). sinh cosh tanh Hyperbolic functions fmod fmod(a,b) returns the remainder of the division a/b. deg Converts radians to degrees. rad Converts degrees to radians. log Logarithm to base 10 ln Natural logarithm exp Exponential function sqrt Square root abs Absolute value step step(x) is 1 when x>0; otherwise it is 0. ceil Rounded upwards floor Rounded downwards minmax min(a,b) gives the minimum of the two arguments.max(a,b) gives the maximum of the two arguments.