math.atan

Python math.atan()方法 (Python math.atan() method)

math.atan() method is a library method of math module, it is used to get the arc tangent, it accepts a number and returns the arc tangent value (in radians) of the given number.

math.atan()方法是数学模块的库方法，用于获取反正切，它接受一个数字并返回给定数字的反正切值(以弧度为单位)。

Note: math.atan() method accepts the only number, if we provide anything else except the number, it returns error TypeError - "TypeError: a float is required".

注意： math.atan()方法接受唯一的数字，如果我们提供除数字以外的其他任何内容，它将返回错误TypeError- “ TypeError：需要浮点数” 。

Syntax of math.atan() method:

math.atan()方法的语法：

    math.atan(x)

Parameter(s): x – is the number whose arc tangent to be calculated.

参数： x –是要计算其反正切值的数字。

Return value: float – it returns a float value that is the arc tangent value of the number x.

返回值： float-返回浮点值，该浮点值是数字x的反正切值。

Example:

例：

    Input:
a = 0.278
# function call
print(math.atan(a))
Output:
0.27115314223853704

Python代码演示math.atan()方法的示例 (Python code to demonstrate example of math.atan() method)

# python code to demonstrate example of 
# math.atan() method 
# importing math module
import math
# number
a = -1
print("atan(",a,") is = ", math.atan(a))
a = 0
print("atan(",a,") is = ", math.atan(a))
a = 0.278
print("atan(",a,") is = ", math.atan(a))
a = 1
print("atan(",a,") is = ", math.atan(a))
a = 123
print("atan(",a,") is = ", math.atan(a))

Output

输出量

atan( -1 ) is =  -0.7853981633974483
atan( 0 ) is =  0.0
atan( 0.278 ) is =  0.27115314223853704
atan( 1 ) is =  0.7853981633974483
atan( 123 ) is =  1.5626664246149526

TypeError example

TypeError示例

# python code to demonstrate example of 
# math.atan() method with an exception
# importing math module
import math
# number
a = "2"
print("atan(",a,") is = ", math.atan(a))

Output

输出量

Traceback (most recent call last):
File "/home/main.py", line 9, in <module>
print("atan(",a,") is = ", math.atan(a))
TypeError: a float is required

翻译自: https://www.includehelp.com/python/math-atan-method-with-example.aspx

math.atan