Posted by **Emily** on Wednesday, May 18, 2011 at 9:01pm.

Two displacement waves are added resulting in constructive interfernce and these waves have the same period T = 1.00 s are described mathematically by:

y1 = (3.0 m) cos[ 2ðt/T + ð ]

y2 = (1.00 m) cos[ 2ðt/T + 2ð ]

(i) What is the resultant displacement at time t = 1?

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