Q11 of 25 Page 627

In any ΔABC, prove that


Need to prove:


We know that, where R is the circumradius.


Therefore,


a = 2R sinA ---- (a)


Similarly, b = 2R sinB and c = 2R sinC


Now,


Therefore,


⇒


⇒


⇒


⇒ [Proved]


More from this chapter

All 25 →
9

In any ΔABC, prove that


 10

In any ΔABC, prove that


 12

In any ΔABC, prove that


 13

In any ΔABC, prove that

a2(cos2B – cos2C) + b2(cos2C – cos2A) + c2(cos2A – cos2B) = 0