Function asin() calculates the radian of a sine value.

Arguments：

• Sine <number>, ∈ [-1, 1]

Returns：

• Radian <number>, ∈ [-PI/2, PI/2]

Common Usage

Example: calculate the radians of the sine value 0.5

return asin(0.5) * 180 / pi()

Example: calculate the radians of a column of sine value 0.5

uncollect [1, -0.5, 0] as a
return asin(a)