Question

How do you express the complex number in trigonometric form `2(cos 270° + i sin 270°)`?

Answer 1

I found: `-2i` (pure imaginary number).

Explanation:

Your number can be written in the form `a+ib` by multiplying:

`2*cos(270^@)+2*isin(270^@)=`
and get:

`=0-2i`