Find the polar expression of i and -1

Question

the title is everything, the question is Find the polar expression of i and -1

Answer 1

For any complex number z we have that z=|z| e^{iθ} where |z| is the length of z and θ its argument. Hence, the polar decomposition of the number i is equal to e^{ i π/2 } and the polar decomposition of the number -1 is equal to e^{ i π }.