Q 1189767617.     A wave represented by the equation `y = a cos( kx - ωt )` is superimposed with another wave to create a stationary wave with point `x = 0` a node. The equation for the other wave is

JEE 1988
A

`a sin(kx + ωt)`

B

`–a cos(kx+ ωt)`

C

`–a sin(kx – ωt)`

D

`a cos(kx– ωt) `

HINT

For a stationary wave to form, two identical waves should travel in opposite direction.
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