

FracCos
You can use theFracCos
function to obtain a fast approximation of the cosine of aFixed
number.
FUNCTION FracCos (x: Fixed): Fract;
x
 The
Fixed
number expressed in radians, whose cosine is to be calculated.DESCRIPTION
The FracCos function returns the cosine, expressed in radians, of theFixed
numberx
.The approximation of Pi/4 used to compute the cosine is the hexadecimal value 0.C910, making the approximation of Pi equal to 3.1416015625, while Pi itself equals 3.14159265.... Despite the approximation of Pi, the cosine value obtained is usually correct to several decimal places.
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