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:
0.9616062271291891Python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