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Elyse Glover
Mathematics
26 January, 14:22
Simplify 5 (cis7pi/4) ^4
+2
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1
)
Katelynn Odonnell
26 January, 14:30
0
-625
Step-by-step explanation:
The magnitude gets raised to the power, and the angle gets multiplied by the power:
5 (cis7pi/4) ^4 = (5^4) cis (4·7π/4) = 625cis (7π) = 625cis (π) = - 625
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