`int_(pi/6)^(2pi)(cos(x))dx` Evaluate the integral and interpret it as a difference of areas. Illustrate with a sketch.

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Textbook Question

Chapter 5, 5.3 - Problem 54 - Calculus: Early Transcendentals (7th Edition, James Stewart).
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tiburtius | High School Teacher | (Level 2) Educator

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The integral actually represents difference between red area and green area shown in the image below i.e.



In other words the area below the graph is greater by `1/2` than the area above the graph.


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