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A monument ABCD stands at A on a level ground. At a point P on the ground the portions AB, AC, AD subtend alpha, beta, gamma respectivelyl. If AB = a, AC = b, AD = c, AP = x and alpha + beta + gamma = 180^(@) "then x"^(2) is equal to |
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Answer» `(a)/(a+B+C)` |
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