
Concept explainers
To write: The given expression in terms of the first power of cosine and verify the answer using a graphing utility.

Answer to Problem 44E
The given expression in terms of the first power of cosine can be written as follows:
Explanation of Solution
Given information:
The following expression:
Formula used:
The following power reduction formula
Calculation:
The given expression can be written in terms of the first power of cosine as follows:
The solution is verified graphically as follows:
Graph:
Sketch the graph using graphing utility.
Step 1: Press WINDOW button to access the Window editor.
Step 2: Press
Step 3: Enter the expressions
Step 4: Press GRAPH button to graph the function.
The graph is obtained as:
Interpretation:
Since both the curves coincide, the solution is verified
Chapter 5 Solutions
Precalculus with Limits: A Graphing Approach
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