JEE Advanced Mathematics question

MathematicsSolution of TrianglesJEE Advanced

Not in JEE syllabus

In a , circumradius and inradius. The value of

is equal to

Answer: (C)

Solution

With etc., , so

a A+b B+c C=R(2A+2B+2C)=4R A B C,

using the triangle identity . Dividing by

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Question ID VK-108721