بدون شرح..........

Function fnACOS(Y)
   fnACOS = fnDeg(3.1415927 / 2 - (fnRad(fnASIN(Y))))
End Function

Function fnDeg(z)
   fnDeg = z * 57.295779513
End Function

Function fnASIN(x)
   fnASIN = fnAT(x / ((1 - x ^ 2) ^ 0.5))
End Function

Function fnRad(z)
   fnRad = z / 57.295779513
End Function

Function fnCS(X2)
   fnCS = Cos(fnRad(X2)
End Function