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

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

Grade:12

1 Answers

SHAIK AASIF AHAMED
askIITians Faculty 74 Points
6 years ago
Hello student,
240-1817_Capture22.PNG
From Lamis theorem
\frac{P}{sin(\pi -(B+C)/2)}=\frac{Q}{sin(\pi -(A+C)/2)}=\frac{R}{sin(\pi -(A+B)/2)}so P:Q:R=cos A/2:cos b/2:cos c/2
Thanks and Regards
Shaik Aasif
askIITians faculty

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