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JEE Main2004MathematicsVector AlgebraActual

Three forces P , Q and R acting along IA, IB and IC, where I is the incentre of a A B C , are in equilibrium. Then P : Q : R is

Options

  1. AA 2 : B 2 : C 2
  2. BA 2 : B 2 : C 2
  3. CA 2 : B 2 : C 2
  4. Dcosec A 2 : cosec B 2 : cosec C 2

Correct answer

A. A 2 : B 2 : C 2

Step-by-step solution

By Lami's theorem aligned & P : Q : R = (90^ + A 2 ): (90^ + B 2 ): (90^ + C 2 ) & A 2 : B 2 : C 2 . aligned

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