Problem: A mass undergoes a sinusoidal oscillation with a frequency of 50 Hz and an amplitude of 7.8 cm. At a time t = 1 s, the position of the mass is x(t) = 5 cm. Write an equation to describe the positon of the mass as a function of time.

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A mass undergoes a sinusoidal oscillation with a frequency of 50 Hz and an amplitude of 7.8 cm. At a time t = 1 s, the position of the mass is x(t) = 5 cm. Write an equation to describe the positon of the mass as a function of time.