1. The problem statement, all variables and given/known data Solve sin(z)=2. 2. Relevant equations sin z=(e^i*z - e^-i*z)/2*i sin z=sin x * cosh y + i*cos x * sinh y (haven't tried this way yet) 3. The attempt at a solution Starting with the first relevant equation, I got z=pi*(1/2 + 2*n) + i*ln(2+sqrt(3)). The book says that another solution is z=pi*(1/2 + 2*n) - i*ln(2+sqrt(3)). How do you get that ?