The wave described by y = 0.25 sin (10pi...

The wave described by `y = 0.25 sin (10pix - 2pif)`, where x and y are in metres and t in seconds, is a wave travelling along the:

`- ve x direction with frequency 1 Hz`

`+ ve x direction with frequency `pi Hz` and wavelength `lambda=0.2m`

`+ ve x direction with frequency 1 Hz and wavelength `lambda=0.2m`

`- ve x direction with amplitude 0.25 m and wavelength `lambda=0.2m`

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