... 1/3 + 1/5 − 1/7 + - - -] or π/4 = − 1/3 + 1/5 − 1/7 + - - - Chapter 17, Problem 25 PROPRIETARY MATERIAL © 2007 The McGraw-Hill Companies, Inc All rights reserved No part of this Manual may be displayed,... 6/(7π) - Thus, = (6/π)[1 − 1/3 + 1/5 − 1/7 + ] f(π/2) ≅ 1.3824 which is within 8% of the exact value of 1.5 (d) From part (c) f(π/2) = 1.5 = (6/π)[1 − 1/3 + 1/5 − 1/7 + - - -] (3/2)(π/6)... >> plot(t,f) 5 -0 -1 -1 0 1 2 Clearly we have the same figure we started with!! PROPRIETARY MATERIAL © 2007 The McGraw-Hill Companies, Inc All rights reserved No part of this Manual may be displayed,