Mathematical constants and basic operations

pi e Trigonometric function

When we are using python, we will use mathematical operations very often. For example, some mathematical constants or trigonometric functions, exponential functions, etc.

This tutorial will teach you how to use these contents.

Python's built-in math library contains a lot of mathematical operations, but for unification, we all use the numpy library.

>>> import numpy as np

>>> np.pi
3.141592653589793

>>> np.e
2.718281828459045

>>> np.sin(np.pi/4)
0.7071067811865476

# Power has priority over division, so there is no need to add parentheses
>>> 2**0.5 / 2
0.7071067811865476

# Euler formula: e^(i*pi)+1=0 numpy can handle complex number operations
>>> np.e ** (0+1j * np.pi)
(-1+1.2246467991473532e-16j)
>>> 

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Start time of this page: December 21, 2021

Completion time of this page: December 21, 2021