DelphiBasics ArcCos Function The Arc Cosine of a number, returned in radians Math unit

function ArcCos(const Number Extended):Extended;

Description The ArcCos function is a mathematical function giving the value in radians of the Arc Cosine of Number.   PI radians  = 180 degrees Notes The System unit supports only the following angular functions: ArcTan Sin Cos Special floating point values INF, -INF yield +PI/2 and -PI/2 respectively. Related commands ArcSin The Arc Sine of a number, returned in radians ArcTan The Arc Tangent of a number, returned in radians Cos The Cosine of a number Sin The Sine of a number Tan The Tangent of a number  Download this web site as a Windows program.

Example code : The ArcCos of 0.5 gives 60 degrees var   float : single; begin   // The ArcCos of 0.5 should give 60 degrees   float := ArcCos(0.5);   float := RadToDeg(float);  // Convert result to degrees   ShowMessage('ArcCos of 0.5 = '+FloatToStr(float)+' degrees'); end; Show full unit code   ArcCos of 0.5 = 60 degrees

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