Mathematics - Properties of Triangle Question with Solution | TestHub

MathematicsProperties of TriangleGeneral (basic formula based)Medium2 minQB

MathematicsMediumsingle choice

In triangle ABC, find cot(A/2)+cot(B/2)+cot(C/2).

Answer:

Solution:

cot(A/2)=s(s-a)/ $Δ$ and cyclic. Their sum is s[3s-(a+b+c)]/ $Δ$ = $s^{2}$ / $Δ$ = $Δ$ / $r^{2}$ since $Δ$ =rs.

Stream:JEESubject:MathematicsTopic:Properties of TriangleSubtopic:General (basic formula based)

⏱ 2mℹ️ Source: QB

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