The following trigonometric functions take one numeric argument and return a floatingpoint number. The argument is expected to be in radians.
FUNCTION RETURNS
acos arccosine
acosh hyperbolic arccosine
acot arccotangent
acoth hyperbolic arccotangent
acsc arccosecant
acsch hyperbolic arccosecant
asec arcsecant
asech hyperbolic arcsecant
asin arcsine
asinh hyperbolic arcsine
atan arctangent
atanh hyperbolic arctangent
cos cosine
cosh hyperbolic cosine
cot cotangent
coth hyperbolic tangent
csc cosecant
csch hyperbolic cosecant
sec secant
sech hyperbolic secant
sin sine
sinh hyperbolic sine
tan tangent
tanh hyperbolic tangent
Example
CLIPS> (cos 0) 1.0 CLIPS> (acos 1.0) 0.0 CLIPS>