Delmar's Standard Textbook Of Electricity
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN: 9781337900348
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 14, Problem 1RQ

Which trigonometric function is used to find the angle if the length of the hypotenuse and of the adjacent side are known?

Expert Solution & Answer
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To determine

The trigonometric function that is used to find the angle if the length of the hypotenuse and length of the adjacent side are known.

Answer to Problem 1RQ

Cosine functionis used to find the angle if the length of the hypotenuse and length of the adjacent side are known.

Explanation of Solution

Delmar's Standard Textbook Of Electricity, Chapter 14, Problem 1RQ

In the figure above,

A: Side opposite to angle X, adjacent to angle Y

B: Side opposite to angle Y, adjacent to angle X

Hence,

Hypotenuse, side A and angle Y are related as : cos Y = side A/Hypotenuse

Hypotenuse, side B and angle X are related as : cos X = side B/Hypotenuse

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