let d = 5 m
f = 264 Hz
v = 348 m
a) wavelength, lamda = v/f
= 348/264
= 1.318 m
b) for distructive interefernce, d*sin(theta) = lamda/2
sin(theta) = lamda/(2*d)
= 1.318/(2*5)
theta = sin^-1(0.1318)
= 7.6 degrees
c) for destructive interference, d*sin(theta) = lamda
sin(theta) = lamda/(d)
= 1.318/5
theta = sin^-1(0.2636)
= 15.3 degrees
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