# Math Help - Complex Numbers

1. ## Complex Numbers

Solve the equation $z^3 + 1 = i$ for the unknown complex quantity $z$. Express your answers in rectangular form to two decimal places.

2. Originally Posted by Aryth
Solve the equation $z^3 + 1 = i$ for the unknown complex quantity $z$. Express your answers in rectangular form to two decimal places.
That means that $z^3=-1+i=\sqrt{2}\left(\cos\left[\frac{3\pi}{4}\right]+i\sin\left[\frac{3\pi}{4}\right]\right)$
Now find the three cube roots.

3. Thanks a lot. This was covered early on in the semester and for the life of me I could not remember how to do it.

4. Originally Posted by Aryth
Thanks a lot. This was covered early on in the semester and for the life of me I could not remember how to do it.
Did you consider consulting your notes or text book?

CB