Trigonometric EquationHard

Question

ABC is a triangle. Forces acting along IA, IB and IC respectively are in equilibrium, where I is the incentre of ᐃABC. Then P : Q : R is

Options

A.sinA : sin B : sinC
B.
C.
D.cosA : cosB : cosC

Solution

     
Using Lami′s Theorem
∴   P : Q : R =

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