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Mathematics
Mathematics
Problem
Evaluate
2
cis
(
π
3
)
×
3
cis
(
2
π
3
)
2 \operatorname{cis} \left( \frac{\pi}{3} \right) \times 3 \operatorname{cis} \left( \frac{2\pi}{3} \right)
2
cis
(
3
π
)
×
3
cis
(
3
2
π
)
.
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