带有Python示例的math.cos()方法
Pythonmath.cos()方法
math.cos()方法是数学模块的库方法,用于获取弧度数的余弦值,它接受一个数字,返回给定弧度的余弦值。
注意:math.cos()方法接受的唯一的号码,如果我们提供任何其他除外数量,则返回错误类型错误-“类型错误:需要浮动”。
它的语法math.cos()方法:
math.cos(x)
Parameter(s):x–是要计算其余弦的数字。
返回值:float-它返回一个浮点值,该值是数字x弧度的余弦值。
示例
Input: a = 0.278 #函数调用 print(math.cos(a)) Output: 0.9616062271291891
Python代码演示示例math.cos()方法
#python代码演示示例 # math.cos() method #导入数学模块 import math #数 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))
输出结果
cos( -1 ) is = 0.5403023058681398 cos( 0 ) is = 1.0 cos( 0.278 ) is = 0.9616062271291891 cos( 1 ) is = 0.5403023058681398
TypeError示例
#python代码演示示例 # math.cos() method with an exception #导入数学模块 import math #数 a = "2" print("cos(",a,") is = ", math.cos(a))
输出结果
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