Find z1z2. Write the answer in polar form with the argument between 0° and 360°.z1 = 1 + i, z2 = 
- i
A. 2
(cos 15° + i sin 15°)
B. 2
(cos 75° + i sin 75°)
C. 
(cos 15° + i sin 15°)
D. 2
(cos 345° + i sin 345°)
Answer: A
Mathematics
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?
?
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?
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