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OpenStudy (anonymous):
For questions 16 - 18, write each expression in the standard form for the complex number a + bi. 16. [ 4 ( cos (7pi/9) + i sin (7pi/9))]^3 17. [ 1/2 ( cos (72degrees) + i sin (72degrees) ) ]^5 18. The complex fifth roots of 5 - 5 sqrt (3) i.
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OpenStudy (precal):
i don't know these, don't you have a precal book?
OpenStudy (precal):
I looked up the formulas from my precal book to help you yesterday
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