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Math387.ArcCos Function
Math387 | Functions | See Also
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Inverse cosine.

Pascal
function ArcCos(const X: double): double; overload;
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Returns

Returns the inverse cosine of X. X must be between -1 and 1.

Description

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

See Also

Cos

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