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If two vertical towers PQ and RS of lengths a and b (a gt b) respectively subtend the same angle alpha at a point A on the line joining their feet P and R in the horizontal plane and angles beta and gamma at another point B on this line nearer the towers on the same side of the towers as A, then (sin (beta - gamma))/(sin(beta - alpha)) is equal to |
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Answer» `(B SIN ALPHA)/((a-b) sin GAMMA)` |
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