10. Which of the following does not represent a wave (stationary or travelling)?
(A) y = 2./x-vt
(B) y = 2 cos (3x) sin (101)
(C) y = 3 sin (5x - 0.5t) + 4 cos (5x - 0.51)
(D) y = cos x sin t + cos 2x sin 2t.
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option B not denotes as a wave because it is function of only of X where as Theta not must be a constant value standard wave equation is y = asin(wt)
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