Concept explainers
To calculate: The exact value of the trigonometric expression.
Answer to Problem 75CR
The required exact value is
Explanation of Solution
Given information:
The trigonometric expression:
Formula used:
Trigonometric formula:
Pythagoras Theorem:
For a right-angle triangle;
Calculation:
The given trigonometric expression is
Also,
To find the exact value of the given expression, use the formula
Here, for
Perpendicular, p = 4 and Hypotenuse, h = 5
By Pythagoras Theorem;
So,
And,
Also, for
Base, b = 4 and Hypotenuse, h = 5
By Pythagoras Theorem;
So,
And,
Now, substitute
Hence, the required exact value is
Chapter 5 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
- Calculus: Early TranscendentalsCalculusISBN:9781285741550Author:James StewartPublisher:Cengage LearningThomas' Calculus (14th Edition)CalculusISBN:9780134438986Author:Joel R. Hass, Christopher E. Heil, Maurice D. WeirPublisher:PEARSONCalculus: Early Transcendentals (3rd Edition)CalculusISBN:9780134763644Author:William L. Briggs, Lyle Cochran, Bernard Gillett, Eric SchulzPublisher:PEARSON
- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning