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Grade 12Algebra

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 ?

Profile image of sudhanshu
12 Years agoGrade 12
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1 Answer

Profile image of SHAIK AASIF AHAMED
12 Years ago
Hello student,
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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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