JEE Advanced Mathematics question

MathematicsSolution of TrianglesJEE Advanced

Not in JEE syllabus

The angle of elevation of the top of a hill from each of the vertices A, B, C of a horizontal triangle is . The height of the hill is

Answer: (B),(C)

Solution

Let the height be . The foot of the hill is at horizontal distance from each vertex (same elevation from each). A point equidistant from A, B, C is the circumcentre, so

R = hα ⇒ h = Rα.

By the sine rule, $ = =

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Question ID VK-108759