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socoil23
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Homework Statement
given 2 waves y1=Ysin(kx-wt): y2=Ysin(kx+wt).
derive expression of resultant displacement and expression of x(for resultant) where displacement always zero
Homework Equations
y=y1+y2
sinA+sinB=2sin((A+B)/2)cos((A-B)/2)
The Attempt at a Solution
i solved first part:y= 2Y sin (kx) cos (-wt)
but i don't understand the 2nd part. does it mean y=0 when sin kx=0? mean x=0?