To show: The resultant of two waves
Given data: Equations of two wave travelling through a taught string that form a standing wave are
Method/Formula used:
Two angles sum and difference formula for cosine is given by
Proof:
The two given waves that form a standing wave are
Substitute
Use formulae (1) by treating
Thus, resultant displacement/amplitude is
Hence, the result.
Chapter 10 Solutions
Holt Mcdougal Larson Algebra 2: Student Edition 2012
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