$A$ sinusoidal wave of wavelength $7.5 \ cm$ travels a distance of $1.2 \ cm$ along the $x$-direction in $0.3 \ s$. The crest $P$ is at $x = 0$ at $t = 0 \ s$ and the maximum displacement of the wave is $2 \ cm$. Which equation correctly represents this wave?
- A$y = 2 \cos (0.83 x - 3.35 t) \ cm$
- B$y = 2 \sin (0.83 x - 3.5 t) \ cm$
- C$y = 2 \cos (3.35 x - 0.83 t) \ cm$
- D$y = 2 \cos (0.13 x - 0.5 t) \ cm$
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