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TLM said:i'm looking for a source code or software which can calculate acos of a complex number
For input of a complex number, Z = X + iY, the complex arccosine is given by,
acos(Z) = acos(B) - i alog(A + sqrt(A^2 - 1)) if Y >= 0
acos(Z) = acos(B) + i alog(A + sqrt(A^2 - 1)) if Y < 0
where
A = 0.5 sqrt((X + 1)^2 + Y^2) + 0.5 sqrt((X - 1)^2 + Y^2)
B = 0.5 sqrt((X + 1)^2 + Y^2) - 0.5 sqrt((X - 1)^2 + Y^2)