Here's the question you clicked on:
ballerinaxbb
Express the complex number in trigonometric form. -3i
@zepdrix Hey can you help?
I think the answer is 3(cos 90° + i sin 90°) but I just need confirmation from someone cause I'm not 100% sure. :)
Hmm so we're moving along the Imaginary axis, in the negative direction, 3 units. So I think we're moving straight DOWN 3 units. So our angle would need to be \(-90^o\) or \(270^o\) :o
3(cos 180° + i sin 180°) 3(cos 270° + i sin 270°) 3(cos 90° + i sin 90°) 3(cos 0° + i sin 0°)
Those are my answer choices
Hmm, one of them has a 270 c; Hmmmmm
Lol so it's that one? 3(cos 270 + i sin 270) ?