Amplitude
Related Words
Definition of Amplitude
Amplitude is half the distance between the minimum and maximum values of the range of a periodic function with a bounded range.
In other words, for functions of the form y = A sin bθ or y = A cos bθ, the amplitude is A.
Examples of Amplitude
Video Examples: Free Math Lessons Sine Graph Amplitude
Solved Example on Amplitude
Ques: Find the amplitude of the function .
Choices:
A.  4B. 4
C. 1/2
D.  3
Correct Answer: B
Solution:

Step 1: Recall that "for functions of the form y = A cos bθ, the amplitude is A".
Step 2: So, 4 is the amplitude of the given function.
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