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Naddik [55]
2 years ago
7

BRAINLIEST HELP PLEASE

Mathematics
1 answer:
serg [7]2 years ago
4 0

Answer:

  (d)  60; 210°

Step-by-step explanation:

The factor -3 is equivalent to 3∠180°. The given product is then ...

  u = 20∠30°

  -3u = (3∠180°)(20∠30°) = (3·20)∠(180°+30°) = 60∠210°

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