Python Tutorials · Module Reference
cMath Module
Learn all about cMath Module in this comprehensive tutorial.
5 min read beginner
- •Python has a built-in module that you can use for mathematical tasks for complex numbers.
Python cmath Module
Python has a built-in module that you can use for mathematical tasks for complex numbers.
The methods in this module accepts int, float, and complex numbers. It even accepts Python objects that has a __complex__() or __float__() method.
The methods in this module almost always return a complex number. If the return value can be expressed as a real number, the return value has an imaginary part of 0.
The cmath module has a set of methods and constants.
cMath Methods
| Method | Description |
|---|---|
| cmath.acos(x) | Returns the arc cosine value of x |
| cmath.acosh(x) | Returns the hyperbolic arc cosine of x |
| cmath.asin(x) | Returns the arc sine of x |
| cmath.asinh(x) | Returns the hyperbolic arc sine of x |
| cmath.atan(x) | Returns the arc tangent value of x |
| cmath.atanh(x) | Returns the hyperbolic arctangent value of x |
| cmath.cos(x) | Returns the cosine of x |
| cmath.cosh(x) | Returns the hyperbolic cosine of x |
| cmath.exp(x) | Returns the value of Ex, where E is Euler's number (approximately 2.718281...), and x is the number passed to it |
| cmath.isclose() | Checks whether two values are close, or not |
| cmath.isfinite(x) | Checks whether x is a finite number |
| cmath.isinf(x) | Check whether x is a positive or negative infinty |
| cmath.isnan(x) | Checks whether x is NaN (not a number) |
| cmath.log(x[, base]) | Returns the logarithm of x to the base |
| cmath.log10(x) | Returns the base-10 logarithm of x |
| cmath.phase() | Return the phase of a complex number |
| cmath.polar() | Convert a complex number to polar coordinates |
| cmath.rect() | Convert polar coordinates to rectangular form |
| cmath.sin(x) | Returns the sine of x |
| cmath.sinh(x) | Returns the hyperbolic sine of x |
| cmath.sqrt(x) | Returns the square root of x |
| cmath.tan(x) | Returns the tangent of x |
| cmath.tanh(x) | Returns the hyperbolic tangent of x |
cMath Constants
| Constant | Description |
|---|---|
| cmath.e | Returns Euler's number (2.7182...) |
| cmath.inf | Returns a floating-point positive infinity value |
| cmath.infj | Returns a complex infinity value |
| cmath.nan | Returns floating-point NaN (Not a Number) value |
| cmath.nanj | Returns coplext NaN (Not a Number) value |
| cmath.pi | Returns PI (3.1415...) |
| cmath.tau | Returns tau (6.2831...) |
Module quiz
2 questions1
Which of the following is true about cMath Module?
2
What is the most common pitfall when working with cMath Module?
Answer all questions to submit.