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- :mod:`cmath` -- mathematical functions for complex numbers
- ==========================================================
- .. module:: cmath
- :synopsis: mathematical functions for complex numbers
- |see_cpython_module| :mod:`python:cmath`.
- The ``cmath`` module provides some basic mathematical functions for
- working with complex numbers.
- Availability: not available on WiPy and ESP8266. Floating point support
- required for this module.
- Functions
- ---------
- .. function:: cos(z)
- Return the cosine of ``z``.
- .. function:: exp(z)
- Return the exponential of ``z``.
- .. function:: log(z)
- Return the natural logarithm of ``z``. The branch cut is along the negative real axis.
- .. function:: log10(z)
- Return the base-10 logarithm of ``z``. The branch cut is along the negative real axis.
- .. function:: phase(z)
- Returns the phase of the number ``z``, in the range (-pi, +pi].
- .. function:: polar(z)
- Returns, as a tuple, the polar form of ``z``.
- .. function:: rect(r, phi)
- Returns the complex number with modulus ``r`` and phase ``phi``.
- .. function:: sin(z)
- Return the sine of ``z``.
- .. function:: sqrt(z)
- Return the square-root of ``z``.
- Constants
- ---------
- .. data:: e
- base of the natural logarithm
- .. data:: pi
- the ratio of a circle's circumference to its diameter
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