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When in the front row, your date's eye level is $h$ units below the bottom of the screen. The rows of seats are inclined up at an angle of $0\le\theta<\dfrac{\pi}{2}$, and there is an aisle of width $w$ between the front row and the wall on which the screen is placed. The height of the screen is $S$. Here is a sketch of the arrangement:

What horizontal distance from the screen maximizes your viewing angle? Be advised, before being seated, your date will expect that you can prove the distance you suggest is the maximum for $\beta$.