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Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698

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BuyFindarrow_forward

Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698
Textbook Problem
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In Exercise 17 to 22, use either the sine ratio or the cosine ratio to find the length of the indicated sides of the triangle correct to the nearest tenth of a unit.

Chapter 11.2, Problem 20E, In Exercise 17 to 22, use either the sine ratio or the cosine ratio to find the length of the

To determine

To find:

The length of the indicated sides of the following triangle,

Elementary Geometry for College Students, Chapter 11.2, Problem 20E

Explanation

Consider the following figure,

General formula for cosine ratio and sin ratio is given below,

cosθ=adjacenthypotenuse and sinθ=oppositehypotenuse

From the given figure the value 20ft is the hypotenuse value since it is opposite to right angle.

Then x. is the length of the leg adjacent to 60 and y is the length of leg opposite to 60.

Therefore,

cos60=x20x=20×cos60

Using a scientific calculator in degree mode, follow the following key sequence,

60cos0

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Chapter 11 Solutions

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