Question

Express the complex number in trigonometric form.

2i

Answer 1

Answer choices:
2(cos 0° + i sin 0°)

2(cos 180° + i sin 180°)

2(cos 270° + i sin 270°)

2(cos 90° + i sin 90°)

Answer 2

Sorry, Melinda :)
Dozed off.
You have choices, so... you can just 'cheat' and try to evaluate them one at a time :)
What's cos 0?

Answer 3

Or, you can pretend you have no choices and try to do it yourself :)
Good practice for you...

Answer 4

2(cos 90° + i sin 90°)