A Wave Is Given by the Equation $y ( x , t ) = 4.0 \cos ( 6 \pi x - 10 \pi t )$

Multiple Choice

A wave is given by the equation $y ( x , t ) = 4.0 \cos ( 6 \pi x - 10 \pi t )$ m. The frequency of the wave is

A) 3 Hz.
B) 5 Hz.
C) 5/3 Hz.
D) 1/5 Hz.
E) 1/3 Hz.