Persamaan Gelombang

\begin{equation*}
\begin{split}
y & = 8 \sin \pi (6t - 2x) \\\\
y & = 8 \sin (6 \pi t - 2 \pi x) = A \sin (\omega t - k x)
\end{split}
\end{equation*}

(A)   amplitudo

\(A = 8 \text{ cm}\)

(B)   frekuensi dan periode

(C)   panjang gelombang

\begin{equation*}
\begin{split}
k & = \frac {2 \pi}{\lambda} \\\\
2 \pi & = \frac {2 \pi}{\lambda} \\\\
\lambda & = 1 \: \dotso \text{ m}
\end{split}
\end{equation*}

(D)   cepat rambat gelombang

\begin{equation*}
\begin{split}
v & = \lambda \:.\: f \\\\
v & = 1 \:.\: 3 \\\\
v & = 3 \: \dotso \text{ m/s}
\end{split}
\end{equation*}