1 Answer

Infinitezero · Answer 1 · 2023-08-01T14:42:09+0000

a The frequency of the sin(x) depends on the period

If the wave has period = 2pi, then the frequency is 1

The frequency of sin(2x) is 2

The given equation is

$v=520\sin (30t-(5\pi)/(4))$

Since the frequency = 2pi/period

Since the period = 2pi/30 = pi/15

Then

$\begin{gathered} F=(2\pi)/((\pi)/(15)) \\ F=2\pi*(15)/(\pi) \\ F=2*15 \\ F=30\text{ HZ} \end{gathered}$

The frequency is 30 Hz

The answer is B

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