Establish the identity and then use it to derive Lagrange's trigonometric identity: 1-2n+1 1 + cos

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Establish the identity

and then use it to derive Lagrange's trigonometric identity:

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Complex Variables and Applications

ISBN: 978-0073051949

8th edition

Authors: James Brown, Ruel Churchill

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Question Posted: Jun 01, 2016 01:35 AM

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Establish the identity and then use it to derive Lagrange's trigonometric identity: 1-2n+1 1 + cos

Question:

1-2n+1 1 + cos θ + cos 2θ + . . . + cos,18 =-+ (0

Step by Step Answer:

If S 1 z z 2 z n then S zS 1 z z 2 z n z z 2 z 3 z n1 1 z n1 Hence S 1 z n1 1 z provided z 1 ...View the full answer

Complex Variables and Applications

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