19) In a triangle ABC, prove that cotA/2 +cot B/2 + cot C/2=S²/delta

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With usual notations prove that in a triangle ABC, `cot(A/2)+cot(B/2)+cot(C/2)=s^2/Delta` With usual notations prove that in a triangle ABC, `cot(A/2)+cot(B/2)+cot(C/2)=s^2/Delta`
Prove: cotA/2 + cotB/2 + cotC/2 = s^2/Delta | Triangle Geometry | JEE, 11th, 12th Prove: cotA/2 + cotB/2 + cotC/2 = s^2/Delta | Triangle Geometry | JEE, 11th, 12th
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🙇‍♂️Prove Tan (c+a)/2=Cot(b/2) where A, B, C are angles of Triangle ABC 🔺🔤 #techno_mathics 🙇‍♂️Prove Tan (c+a)/2=Cot(b/2) where A, B, C are angles of Triangle ABC 🔺🔤 #techno_mathics
In any `DeltaABC`, prove that `cot (A/2) + cot (B/2) + cot (C/2) = (a+b+c)/(b+c-a) cot (A/2)` In any `DeltaABC`, prove that `cot (A/2) + cot (B/2) + cot (C/2) = (a+b+c)/(b+c-a) cot (A/2)`