Posted by **Anon** on Friday, January 20, 2012 at 7:05pm.

Write the three cube roots of 8 cis (-30°).

- Precalculus -
**Damon**, Friday, January 20, 2012 at 7:19pm
2 e^i(-30/3) = 2 cis -10

2 e^i(-30/3 +360/3)= 2 cis 110

2 e^i(-30/3 -360/3) = 2 cis -130

- Precalculus -
**Anon**, Friday, January 20, 2012 at 7:22pm
This is probably silly, but where is the 2 in the beginning of all of those from?

- Precalculus -
**Damon**, Friday, January 20, 2012 at 7:23pm
2*2*2 = 8

- Precalculus -
**Anon**, Friday, January 20, 2012 at 7:24pm
Ohmygoodness. Hhaha. Thanks!

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