Question

Express the complex number in trigonometric form.

-2i

Answer 1

you need two numbers, the absolute value of \(-2i\) which is the distance it is from 0, i.e.
\[|-2i|=2\] and also the angle

Answer 2

do you know what the angle is?

Answer 3

no I dont

Answer 4

you can use 270 degrees or if you are working in radians \(\frac{3\pi}{2}\)