Copyright (C) 2000-2012 |
GNU Info (python2.1-lib.info)cmathMathematical functions for complex numbers ========================================== Mathematical functions for complex numbers. This module is always available. It provides access to mathematical functions for complex numbers. The functions are: `acos(x)' Return the arc cosine of X. `acosh(x)' Return the hyperbolic arc cosine of X. `asin(x)' Return the arc sine of X. `asinh(x)' Return the hyperbolic arc sine of X. `atan(x)' Return the arc tangent of X. `atanh(x)' Return the hyperbolic arc tangent of X. `cos(x)' Return the cosine of X. `cosh(x)' Return the hyperbolic cosine of X. `exp(x)' Return the exponential value `e**X'. `log(x)' Return the natural logarithm of X. `log10(x)' Return the base-10 logarithm of X. `sin(x)' Return the sine of X. `sinh(x)' Return the hyperbolic sine of X. `sqrt(x)' Return the square root of X. `tan(x)' Return the tangent of X. `tanh(x)' Return the hyperbolic tangent of X. The module also defines two mathematical constants: `pi' The mathematical constant _pi_, as a real. `e' The mathematical constant _e_, as a real. Note that the selection of functions is similar, but not identical, to that in module `math' . The reason for having two modules is that some users aren't interested in complex numbers, and perhaps don't even know what they are. They would rather have `math.sqrt(-1)' raise an exception than return a complex number. Also note that the functions defined in `cmath' always return a complex number, even if the answer can be expressed as a real number (in which case the complex number has an imaginary part of zero). automatically generated by info2www version 1.2.2.9 |