Which of the following is correct regarding the \( \mathrm{P} \) pr...

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Which of the following is correct regarding the
\( \mathrm{P} \) progressive wave \( y=10 \sin 2 \pi\left(\frac{x}{8}+\frac{t}{4}\right) \), (where \( x \) is

W. in metre and \( t \) in second)?
(1) Angular frequency is \( 2 \pi \) and propagation constant is \( \pi \)
(2) Frequency is \( 4 \mathrm{~Hz} \) and wavelength is 8 metre
(3) Amplitude is 10 metre and wavelength is \( \frac{1}{8} \) metre
(4) Wavelength is 8 metre and frequency is \( \frac{1}{4} \mathrm{~Hz} \)
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