Posted by **James** on Wednesday, April 13, 2011 at 8:24pm.

Two waves with different periods are described mathematically by:

y1 = (7.0 m)cos[ 2£kt/(3.0 ms)-£k/2 ]

y2 = (2.0 m)cos[ 2£kt/(3.1 ms)-3£k/2]

What is the beat frequency for these two waves?

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