Thomas' Calculus 13th Edition

Published by Pearson
ISBN 10: 0-32187-896-5
ISBN 13: 978-0-32187-896-0

Chapter 5: Integrals - Section 5.2 - Sigma Notation and Limits of Finite Sums - Exercises 5.2 - Page 265: 3



Work Step by Step

4$\Sigma$k-1 cosk$\pi$=cos(1$\pi$)+cos(2$\pi$)+cos(3$\pi$)+cos(4$\pi$) =-1+1-1+1 =0
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