What is the value of ln(−i)\ln(-i)ln(−i) (principal branch)?
−iπ/2-i\pi/2−iπ/2
iπ/2i\pi/2iπ/2
i3π/2i3\pi/2i3π/2
ln(1)−iπ/2\\ln(1) - i\pi/2ln(1)−iπ/2