Argument for Vanishing Here the integral over the arc vanishes since W Se -A(Re) Rei de ≤R -AR cos 0 e R™ |e - sº | do

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 74E
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I found this online, and I don't understand how they are making the bound from cos(theta) to it being less than or equal to 1-2(theta)/pi.  Do you know?

Argument for Vanishing Here the integral over the arc vanishes since
-A(Reº) ¿Re¹0 do ≤R
i0
Te
-AR cos 0
e
|e-
sºde
-AR(1-20/π)
<R
R. [
e
de
Transcribed Image Text:Argument for Vanishing Here the integral over the arc vanishes since -A(Reº) ¿Re¹0 do ≤R i0 Te -AR cos 0 e |e- sºde -AR(1-20/π) <R R. [ e de
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