Question

Express the complex number in trigonometric form.

-6i

6(cos 0° + i sin 0°)

6(cos 270° + i sin 270°)

6(cos 180° + i sin 180°)

6(cos 90° + i sin 90°)

Answer 1

it can't be the first since sin 0 is 0
think about the remaining three

Answer 2

I honestly have no idea how to even start that, my teacher didn't explain it properly so its confusing me. Can we go through this step by step? @Kanwar245

Answer 3

6(cos 270° + i sin 270°)

Answer 4

ohhhhh so thats how you figure it out?

Answer 5

well how do you know that 6i is there? @myko