The wave described by y = 0.25 sin(10$\pi $x $-$ 2$\pi $t), where x and y are in metres and t in seconds, is a wave travelling along the
+ve x direction with frequency 1 Hz and wavelength $\lambda $ = 0.2 m.
$-$ve x direction with amplitude 0.25 m and wavelength $\lambda $ = 0.2 m.
$-$ve x direction with frequency 1 Hz.
+ve x direction with frequency $\pi $ Hz and wavelength $\lambda $ = 0.2 m.
