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Let z1=2(cos⁡5π6+isin⁡5π6)z _ { 1 } = 2 \left( \cos \frac { 5 \pi } { 6 } + i \sin \frac { 5 \pi } { 6 } \right)

Question 9

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Let z1=2(cos⁡5π6+isin⁡5π6)z _ { 1 } = 2 \left( \cos \frac { 5 \pi } { 6 } + i \sin \frac { 5 \pi } { 6 } \right) and z2=5(cos⁡π3+isin⁡π3)z _ { 2 } = 5 \left( \cos\frac { \pi } { 3 } + i \sin \frac { \pi } { 3 } \right) . Find Z1Z2Z _ { 1 } Z _ { 2 }

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