Sound waves from different source are interfering and pressure at same point in space is given as- P = P₀ sin(200πt + π/2) cos(3πt + π/3)
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Sound waves from different source are interfering and pressure at same point in space is given as− P = P₀ sin(200πt + π/2) cos(3πt + π/3)

G1 Physics · Accepted Answer

Step 1: Use sinA cosB = ½[sin(A+B)+sin(A−B)]. Step 2: The two source angular frequencies are (200π±3π) rad s⁻¹, i.e. 101.5 Hz and 98.5 Hz. Their difference is 3 Hz. Therefore A and B are correct.