\( y_{\max } \)\(=0.25 \)
\(k=\frac{2 \pi}{\lambda}=10 \pi \Rightarrow \lambda=0.2 \mathrm{m}\)
\(\omega=2 \pi f=2 \pi \Rightarrow f=1 \mathrm{Hz}\)
The sign is negative inside the bracket. Therefore this wave travels in the positive \(x -direction\)