   Chapter 11.2, Problem 23E Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085

Solutions

Chapter
Section Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085
Textbook Problem

In Exercise 23 to 28, use either the sine ratio or the cosine ratio as needed to find the measure of each indicated angle to the nearest degree. To determine

To find:

The measure of each indicated angle of the following triangle, Explanation

Consider the following figure,

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

From the given figure the value 10 m is the hypotenuse value since it is opposite to right angle.

Then 5 is the length of the leg adjacent to α and 5 m. is the length of leg opposite to β.

Therefore,

sinβ=510sinβ=12β=sin1(12)

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

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