What is an expression for the standing wave that is produced by adding the two waves
(2.5 cm)sin[(3.0 m-1)x - (27 s-1 )t]
and
(2.5 cm)sin[(3.0 m-1)x + (27 s-1)t]
(2.5 cm)sin[(3.0 m-1)x - (27 s-1 )t]
and
(2.5 cm)sin[(3.0 m-1)x + (27 s-1)t]
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