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Express cos 60 as a polynomial of cos 0: Cos 60

Express cos 60 as a polynomial of cos 0: Cos 60

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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[Complex Variables] How do you solve this?

Hint: Consider z = cos(theta) + isin(theta)

Theorem (De Moivre Theorem) Vn E N,0 E R, it holds that (cos 0 + i sin 0)" Cos n0 + i sin n0
Transcribed Image Text:Theorem (De Moivre Theorem) Vn E N,0 E R, it holds that (cos 0 + i sin 0)" Cos n0 + i sin n0
Express cos 60 as a polynomial of cos 0: Cos 60
Transcribed Image Text:Express cos 60 as a polynomial of cos 0: Cos 60
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