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20.2. The cmath module: complex math

For computations involving complex numbers, the cmath module includes all the functions of the math except for atan2, ceil, floor, fmod, frexp, hypot, ldexp, modf, and pow.

In addition, it provides these functions:

acosh(x)Hyperbolic arc cosine of x.
asinh(x)Hyperbolic arc sine of x.
atanh(x)Hyperbolic arc tangent of x.