Hint: The angle may be too large to use small angle approximation.

Sound waves of frequency 567 Hz enter a window 1.1 m wide. The window is in the exact center of one wall of a theater 24 m by 12 m. The window is 12 m from the opposite wall, along which is a row of seats occupied by people. The theater is acoustically prepared to prevent the reflection of sound waves, and the speed of sound is 330 m/s. Two people, on each side of a line directly in front of the window, in the row along the wall hear no sound.

What minimum distance are they from each other? Answer in units of m.

Sound waves of frequency 567 Hz enter a window 1.1 m wide. The window is in the exact center of one wall of a theater 24 m by 12 m. The window is 12 m from the opposite wall, along which is a row of seats occupied by people. The theater is acoustically prepared to prevent the reflection of sound waves, and the speed of sound is 330 m/s. Two people, on each side of a line directly in front of the window, in the row along the wall hear no sound.

What minimum distance are they from each other? Answer in units of m.

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