Originally Posted by

**amma0913** Wave beats occur when two waves have frequencies that are close but not identical. Start with the expressionsin(w1t)+sin(w2t),where w1~ w2 and w1-w2 is not equal to 0. From this expression, it probably is not obvious why wave beats occur. Can you derive an expression that is equal to the one given but much more useful in accounting for the

presence of wave beats? (Hints: sin(A + B) = sin(A)cos(B) + cos(A)sin(B), cos("A) = cos(A), and sin("A) = "sin(A).)

Thanks for the help!