tf.acos

Python math.acos()方法 (Python math.acos() method)

math.acos() method is a library method of math module, it is used to get the arc cosine, it accepts a number between -1 to 1 and returns the arc cosine value (in radians) of the given number.

math.acos()方法是數學模塊的庫方法，用于獲取反余弦，它接受-1到1之間的數字，并返回給定數字的反余弦值(以弧度為單位)。

Note: math.acos() method accepts the only number between the range of -1 to 1, if we provide number out of the range, it returns a ValueError - "ValueError: math domain error", and if we provide anything else except the number, it returns error TypeError - "TypeError: a float is required".

注意： math.acos()方法僅接受介于-1到1之間的數字，如果我們提供的數字超出該范圍，則它將返回ValueError- “ ValueError：math domain error” ，并且如果我們提供除此以外的任何內容數字，它返回錯誤TypeError- “ TypeError：需要浮點數” 。

Syntax of math.acos() method:

math.acos()方法的語法：

math.acos(x)

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

參數： x –是要計算其反余弦的數字。

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

返回值： float –返回一個浮點值，該浮點值是數字x的反余弦值。

Example:

例：

Input:a = 0.278# function callprint(math.acos(a))Output:0.2853901924877167

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

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

Output

輸出量

acos( -1 ) is = 3.141592653589793 acos( 0 ) is = 1.5707963267948966 acos( 0.278 ) is = 1.2890849198520296 acos( 1 ) is = 0.0

ValueError example

ValueError示例

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

TypeError example

TypeError示例

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

tf.acos

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