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Find the fifth roots of 243(cos 240° + i sin 240°). (5 points)

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5 votes

Answer:3

Step-by-step explanation:r( cos Ф + i sinФ) is the fifth root of 243(cos 240 + i sin 240), then r^5( cos Ф + i sin Ф )^5 = 243(cos 240 + i sin 240).

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