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OpenStudy (anonymous):
Please help! :) What are the three roots of 27(cos (9π/5) i sin (9π/5))? Express the answers in trigonometric form.
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OpenStudy (dan815):
hmm is it +i(...)
OpenStudy (anonymous):
use De Moivre's formula for finding nth root of a complex number.for a complex number |dw:1370945682343:dw| the roots are given by|dw:1370945737345:dw|
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