What Are the Four Roots Of $16\left(\cos \frac{8 \pi}{15}+i \sin \frac{8 \pi}{15}\right) ?$

question 16

Essay

What are the four roots of $16\left(\cos \frac{8 \pi}{15}+i \sin \frac{8 \pi}{15}\right) ?$
Express the answers in trigonometric form.

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