Problem

Write the mathematical representation of the wave graphed in the following two figures.

A

y = (7.5 cm) cos[(1.26 cm^{−1})x − (44.9 s^{−1})t]

B

y = (7.5 cm) cos[(2.51 cm^{−1})x − (89.8 s^{−1})t]

C

y = (7.5 cm) sin[(1.26 cm^{−1})x − (44.9 s^{−1})t]

D

y = (7.5 cm) sin[(2.51 cm^{−1})x − (89.8 s^{−1})t]

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