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.

Question

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.

precal · Answer

i don't know these, don't you have a precal book?

precal · Answer

I looked up the formulas from my precal book to help you yesterday