
(a)
To Find: The amplitude, period, phase and horizontal shift for the function
(a)

Answer to Problem 6T
The amplitude is 5, period is
Explanation of Solution
Given:
The given function is,
Calculation:
The general cosine curves is,
Where,
a is amplitude, b phase shift factor.
The general equation of period is,
The given sine curve is,
Compare equation (1) and (2), amplitude a is 5, phase shift b is 0 and k is 4.
Substitute 4 for k in equation (2),
In the given equation phase is 0 and horizontal function is also 0.
Hence, the amplitude is 5, period is
(b)
To sketch: The graph for one complete period for
(b)

Explanation of Solution
The interval on which the graphs complete one period is
The graph of the function
Figure (1)
The Figure (1) shows the graph of one complete period of
If
Since, k is4, therefore the graph will shrink horizontal.
Chapter 5 Solutions
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