(a)
To demonstrate: The given identity for
(a)

Explanation of Solution
Given:
The identity:
Graph:
As per the given problem
Consider the left hand side of the equation
Put
Graph the two terms individually.
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 table feature of the graphing utility shows the two expressions.
Subtract
Interpretation: According to the above table, it can be observed that
Therefore, the identity
(b)
To demonstrate: The given identity for
(b)

Explanation of Solution
Given:
The identity:
Graph:
As per the given problem
Consider the left hand side of the equation
Put
Graph the two terms individually.
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 table feature of the graphing utility shows the two expressions.
Subtract
Interpretation: According to the above table, it can be observed that
Therefore, the identity
Chapter 5 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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