Find the exact area of the surface obtained by rotating the curve about the x-axis. y = sin(pix/4),    0 ≤ x ≤ 4

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter3: Functions And Graphs
Section3.2: Graphs Of Equations
Problem 44E
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Find the exact area of the surface obtained by rotating the curve about the x-axis.

y = sin(pix/4),    0 ≤ x ≤ 4
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