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- User Defined Functions
- 自定义函数的注意事项（Function Notes）
- Function _ArrayAdd
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- Language Reference
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Function ASin
ASin
求某个数的反正弦值（arcsine）。
ASin ( 表达式 )
参数
| 表达式 | -1到1（包括-1和1在内）之间的任意数。 |
返回值
返回表达式的反正弦值（反三角函数的一种），结果以弧度表示。注意
ASin(x) 在数学定义上只可以接受 -1 < x < 1，因此若x的值不在该范围内则返回值为 -1。相关
Sin, Cos, Tan, ACos, ATan示例
$x = ASin(0.5)
$pi = 3.14159265358979
$radToDeg = 180 / $pi
$y = ASin(1) * $radToDeg ;1 的反正弦值是 90°
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