find the angle between the curve y = cos 3x and the x-axis when it crosses the axis? A. 70 deg B. 66 deg C. 72 deg D. 68 deg

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter78: Computing Angles Made By The Intersection Of Two Angular Surfaces
Section: Chapter Questions
Problem 4A
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find the angle between the curve y = cos 3x and the x-axis when it crosses the axis?

A. 70 deg

B. 66 deg

C. 72 deg

D. 68 deg

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