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the complex number for -2i

Who knows how to find the complex number for -2i  in trigonometric form?
asked Jul 27, 2017 in Algebra by Christian

1 Answer

The following is probably the best solution for this task:

z = 0 -2i

|z| = 2

θ = 3π/2

z = 2(cos 3π/2 + i sin 3π/2)
answered Jul 27, 2017 by quickwriter (2,510 points)