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String Meaning str1 * str2 Multiplication (see also Section 3.1.1) str1 /str2 Division (see also Section 3.1.2) str1**(y) Raised to the power y (see also Section 3.1.3) log(str1) Common Logarithm (to base 10) ln(str1) Natural Logarithm exp(str1) Exponential (expstr1> sqrt(str1) Square root sin(str1) Sine cos(str1) Cosine tan(str1) Tangent asin(str1) Arc Sine acos(str1) ArcCosine atan(str1) Arc Tangent sinh(str1) Hyperbolic Sine cosh(str1) Hyperbolic Cosine tanh(str1) Hyperbolic Tangent