JEE Advanced Mathematics question

MathematicsSolution of TrianglesJEE Advanced

Not in JEE syllabus

Given an isosceles triangle whose inradius is . If one of the angles of the triangle is then the area of the triangle in square units is

Answer: (B)

Solution

The angle must be the vertex angle: , , . By the sine rule .

\dfrac\sin\dfracb^2\dfrac{\sqrt3}{2}$ =

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Question ID VK-110520