Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter65: Achievement Review—section Six
Section: Chapter Questions
Problem 33AR: Compute the cross-sectional area of the grooved block shown. Round the answer to 1 decimal place.
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Concept explainers
Ratios
A ratio is a comparison between two numbers of the same kind. It represents how many times one number contains another. It also represents how small or large one number is compared to the other.
Trigonometric Ratios
Trigonometric ratios give values of trigonometric functions. It always deals with triangles that have one angle measuring 90 degrees. These triangles are right-angled. We take the ratio of sides of these triangles.
Question
Metal rain gutters A rain gutter is made from sheets of metal
9 in wide. The gutters have a 3-in base and two 3-in sides, folded
up at an angle θ (see figure). What angle θ maximizes the crosssectional
area of the gutter?
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