Question

Express the complex number in trigonometric form.
-3i

Answer 1

@RadEn?

Answer 2

@Psymon ?

Answer 3

I have my own studying to attend to right now, unfortunately. Sorry x_X

Answer 4

its ok :P thanks

Answer 5

-3i is in the form a+bi where

a = 0
b = -3

you would then plug these two values into the formula

r = sqrt(a^2 + b^2)

to find the value of theta, you would plot the point (0,-3) since a = 0 and b = -3, can you see what the angle theta is?