Flash cards
Review the key moves
1/3
Core idea
What is the main idea behind Python cmath Module?
Lesson checks
Practice each idea before moving on
Short Mimo-style checks built from this lesson's code, terms, and sequence.
1Quick choice
Which statement best captures the main point of this lesson?
2Order
Put the learning moves in the order that makes the concept easiest to apply.
The methods in this module accepts int , float , and complex numbers.
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 E x , 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...) |