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A traveling funchion,t) wave is descaibed by the 2cos (31t is in 4ICK andl where tis in geconds a) In what diuchion is the wa
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Solution (a) In +ve x direchos. b D- 31 and K = 411 But K= @ = v= 42 = 21 so v= 0.75m/5 r oots 7 onls © f = (20m) [-sin (311

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