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Physics

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Consider the following standing wave, (all units are SI)

z=0.2sin(0.4y)cos(350t)

(a) The values of y where the displacement is always zero, are of the form y=a+bn, where n=0,±1,±2,3, etc.

What is a?

(b) The values of t where the displacement at all values of y equals to zero are of the form : t=c+dn, where n=0,±1,±2,3, etc.

What is c ?
what is d ?

  • Physics - ,

    plz help.....!

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