Delmar's Standard Textbook of Electricity (MindTap Course List)
Delmar's Standard Textbook of Electricity (MindTap Course List)
6th Edition
ISBN: 9781285852706
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 15, 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 (MindTap Course List), Chapter 15, 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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