Class 9 Homework-

Forces P,Q,R acting along OA,OB,OC in the plane of the \(\triangle\)ABC are in equalibrium . Prove that ,If O is the circumcentre of \(\triangle{ABC}\), then

a) \({P\over{sin2A} }={Q\over{sin2B}}={R\over{sin2C}}\)

b) \({P\over{a^2(b^2+c^2-a^2)}}={Q\over{b^2(c^2+a^2-b^2)}}={R\over{c^2(a^2+b^2-c^2)}}\)




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