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# Math Function

## Function

1. Basic Function 初等函数
2. Special Function 特殊函数
3. Complex Function 复变函数
4. Internal Function - system function in the .class file.
5. External Function - user-defined function in text file, which is auto loaded. You can add your own new function.

## Basic function

 abs(x) Absolute value of argument. sqrt(x) Square root of argument . Equivalent to root(argument,2) cbrt(x) Cube root of argument. Equivalent to root(argument,3) ln(x) Natural logarithm of argument (base-E logarithm of argument ) log(x) Natural logarithm of argument (base-E logarithm of argument ) lg(x) Logarithm base-10 of argument, equivalent to log(argument,10). log10(x) Logarithm base-10 of argument. exp(x) Exponential Function E to the power of argument, equivalent to E^argument sin(x) Sine of argument cos(x) Cosine tan(x) Tangent cot(x) Cotangent sec(x) Secant of argument, equiv. to 1/cos(arg). csc(x) Cosecant, equiv. to 1/sin(arg). asin(x) Arc sine acos(x) Arc cosine atan(x) Arc tangent acot(x) Arc cotangent asec(x) Arc secant, inverse secant. acsc(x) Arc cosecant, inverse cosecant. sinh(x) Hyperbolic sine, Sinus hyperbolicus cosh(x) Hyperbolic cosine, Cosinus hyperbolicus tanh(x) Hyperbolic tangent, Tangens hyperbolicus coth(x) Hyperbolic cotangent, Cotangens hyperbolicus sech(x) Hyperbolic secant, Secans hyperbolicus. csch(x) Hyperbolic cosecant, Cosecans hyperbolicus. asinh(x) Area sine, Area sinus hyperbolicus, inverse sinh(x). acosh(x) Area cosine, Area cosinus hyperbolicus, inverse cosh(x). atanh(x) Area tangent, Area tangens hyperbolicus, inverse tanh(x). acoth(x) Area cotangent, Area cotangens hyperbolicus, inverse coth(x). asech(x) Area- secant, Area secans hyperbolicus, inverse sech(x). acsch(x) Area- cosecant, Area cosecans hyperbolicus, inverse csch(x). round(x) Rounds argument up or down to the closest integer floor(x) Rounds arg down. ceil(x) Rounds arg up. atan2(y,x) inverse of two argument tan

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