Two waves are given by y1 = a sin (ωt - kx ) and y2

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Two waves are given by y₁ = a sin (ωt - kx ) and y₂ = a cos (ωt - kx). The phase difference between them is

1. π / 4
2. π / 6
3. π / 8
4. π / 2

Correct Option: D

NA