The path difference between two waves \( \mathrm{y}_{1}=\mathrm{A}_...

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The path difference between two waves \( \mathrm{y}_{1}=\mathrm{A}_{1} \) sin
\( \mathrm{P} \) \( \omega t \) and \( \mathrm{y}_{2}=\mathrm{A}_{2} \cos (\omega \mathrm{t}+\phi) \) will be
(1) \( (\lambda 2 \pi) \phi \)
(2) \( (\lambda / 2 \pi)(\phi+\pi / 2) \)
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(3) \( (2 \pi / \lambda)(\phi-\pi / 2) \)
(4) \( (2 \pi / \lambda) \phi \)
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