   Chapter 11.3, Problem 37E 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 Exercises 33 to 38, we expand the list of trigonometric identities. As you may recall, an identity is a statement that is true for all permissible choices of the variable (see page 510.)a) Explain why cos α = sin ( 90 ∘ − α ) . b) Use your calculator to show that cos 29 ∘ and sin 61 ∘ are equivalent. To determine

a)

To explain: Why cosα=sin(90α).

Explanation

Given:

In right ΔABC, 90α=β

Also, cos

To determine

b)

To show: The value of cos29andsin61 are equivalent by using calculator.

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