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Math387.ArcSin Function

Inverse sine.

Pascal
function ArcSin(const X: double): double; overload;

the inverse sine of X. X must be between -1 and 1.

The return value will be in the range [-PI/2,PI/2], in radians for a real argument. To obtain an inverse sine for X outside the interval [-1,1] use the complex version of the function.

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