The stationary wave y = 2a sin kx cos wt in a stretched string is the result of superposition of y 1 = a sin (kx – wt) and
A
y 2 = a cos (kx + 
t)
t)
B
y 2 = a sin (kx + 
t)
t)
C
y 2 = a cos (kx – 
t)
t)
D
y 2 = a sin (kx – 
t)
t)
Text Solution
Verified by ExpertsThe correct answer is:
B
According to the principle of superposition, the resultant wave is
Using trigonometric identity
We get 
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