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Python计算三角函数之asin()方法的使用

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Release： 2016-06-10 15:12:31
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 asin()方法返回x的反正弦，以弧度表示。
语法

以下是asin()方法语法：

asin(x)
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注意：此函数是无法直接访问的，所以我们需要导入math模块，然后需要用math的静态对象来调用这个函数。
参数

  • x -- 这必须是在-1到1的数字值的范围内，如果x大于1，则它会产生一个错误。

返回值

此方法返回的x反正弦，以弧度表示。
例子

下面的例子显示了asin()方法的使用。

#!/usr/bin/python
import math

print "asin(0.64) : ", math.asin(0.64)
print "asin(0) : ", math.asin(0)
print "asin(-1) : ", math.asin(-1)
print "asin(1) : ", math.asin(1)
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当我们运行上面的程序，它会产生以下结果：

asin(0.64) : 0.694498265627
asin(0) : 0.0
asin(-1) : -1.57079632679
asin(1) : 1.57079632679
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