math.asin()方法是数学模块的库方法,用于获取反正弦值,它接受介于-1到1之间的数字,并返回给定数字的反正弦值(以弧度为单位)。
注意: math.asin()方法接受-1到1之间的范围内的唯一号码,如果我们提供数超出范围,则返回一个ValueError异常- “ValueError异常:数学领域的错误”,如果我们提供任何其他除外数量,则返回错误类型错误- “ TypeError:需要浮点数”。
它的语法 math.asin() 方法:
math.asin(x)
Parameter(s): x –是要计算其反正弦值的数字。
返回值: float-它返回一个浮点值,它是数字x的反正弦值。
示例
Input: a = 0.278 # 函数调用 print(math.asin(a)) Output: 0.281711406942867
# python代码演示示例 # math.asin() method # 导入数学模块 import math # 数 a = -1 print("asin(",a,") is = ", math.asin(a)) a = 0 print("asin(",a,") is = ", math.asin(a)) a = 0.278 print("asin(",a,") is = ", math.asin(a)) a = 1 print("asin(",a,") is = ", math.asin(a))
输出结果
asin( -1 ) is = -1.5707963267948966 asin( 0 ) is = 0.0 asin( 0.278 ) is = 0.281711406942867 asin( 1 ) is = 1.5707963267948966
ValueError示例
# python代码演示示例 # math.asin() method with an exception # 导入数学模块 import math # 数 a = 2 print("asin(",a,") is = ", math.asin(a))
输出结果
Traceback (most recent call last): File "/home/main.py", line 9, in <module> print("asin(",a,") is = ", math.asin(a)) ValueError: math domain error
TypeError示例
# python代码演示示例 # math.asin() method with an expection # 导入数学模块 import math # 数 a = "2" print("asin(",a,") is = ", math.asin(a))
输出结果
Traceback (most recent call last): File "/home/main.py", line 9, in <module> print("asin(",a,") is = ", math.asin(a)) TypeError: a float is required