Python math.cos()方法 (Python math.cos() method)

math.cos() method is a library method of math module, it is used to get the cosine of the number radians, it accepts a number returns the cosine of the given number radians.

math.cos()方法是數學模塊的庫方法，用于獲取弧度數的余弦，它接受一個數字，返回給定弧度的余弦。

Note: math.cos() 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.cos()方法接受唯一的數字，如果我們提供除數字以外的其他任何內容，它將返回錯誤TypeError- “ TypeError：需要浮點數” 。

Syntax of math.cos() method:

math.cos()方法的語法：

math.cos(x)

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

參數： x –是要計算其余弦的數字。

Return value: float – it returns a float value that is the cosine value of the number x radians.

返回值： float-它返回一個浮點值，該值是數字x弧度的余弦值。

Example:

例：

Input:a = 0.278# function callprint(math.cos(a))Output:0.9616062271291891

Python代碼演示math.cos()方法的示例 (Python code to demonstrate example of math.cos() method)

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

Output

輸出量

cos( -1 ) is = 0.5403023058681398 cos( 0 ) is = 1.0 cos( 0.278 ) is = 0.9616062271291891 cos( 1 ) is = 0.5403023058681398

TypeError example

TypeError示例

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

Output

輸出量

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

翻譯自: https://www.includehelp.com/python/math-cos-method-with-example.aspx

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