Establish the identity and then use it to derive Lagrange's trigonometric identity: 1-2n+1 1 + cos
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and then use it to derive Lagrange's trigonometric identity:
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1-2n+1 1 + cos θ + cos 2θ + . . . + cos,18 =-+ (0
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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
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Related Book For
Complex Variables and Applications
ISBN: 978-0073051949
8th edition
Authors: James Brown, Ruel Churchill
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