Show that cosA/a + cosB/b + cosC/c = a² + b² + c²/2abc | PROPERTIES OF TRIANGLES | INTERMEDIATE 1st

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For any triangle ABC, prove that `(cosA)/a+(cosB)/b+(cosC)/c=(a^2+b^2+c^2)/(2a b c)`... For any triangle ABC, prove that `(cosA)/a+(cosB)/b+(cosC)/c=(a^2+b^2+c^2)/(2a b c)`...
Prove that a/bc + cosA/a = b/ca + cosB/b = c/ab + cosC/c | PROPERTIES OF TRIANGLES| INTERMEDIATE 1st Prove that a/bc + cosA/a = b/ca + cosB/b = c/ab + cosC/c | PROPERTIES OF TRIANGLES| INTERMEDIATE 1st
For any triangle ABC, prove that `(cosA)/a+(cosB)/b+(cosC)/c=(a^2+b^2+c^2)/(2a b c)`... For any triangle ABC, prove that `(cosA)/a+(cosB)/b+(cosC)/c=(a^2+b^2+c^2)/(2a b c)`...
Prove that :- a(b cosC - c cosB) = b² - c² Prove that :- a(b cosC - c cosB) = b² - c²
In any triangle ABC,Prove that: (cos A)/(a)+(a)/(bc)=(cos B)/(b)+(b)/(ca)=(cos C)/(c)+(c)/(ab) In any triangle ABC,Prove that: (cos A)/(a)+(a)/(bc)=(cos B)/(b)+(b)/(ca)=(cos C)/(c)+(c)/(ab)
Prove that 2(bc.cos A + ca.cos B + ab.cos C) = a² + b² + c² | PROPERTIES OF TRIANGLES | INTER 1st Prove that 2(bc.cos A + ca.cos B + ab.cos C) = a² + b² + c² | PROPERTIES OF TRIANGLES | INTER 1st
Prove that a.sin(B-C)/b²-c² = b.sin(C-A)/c²-a² = c.sin(A-B)/a²-b² | PROPERTIES OF TRIANGLES Prove that a.sin(B-C)/b²-c² = b.sin(C-A)/c²-a² = c.sin(A-B)/a²-b² | PROPERTIES OF TRIANGLES
Prove that (a² + b² - c²) / (c² + a² - b²) = tan⁡B/tan⁡C | PROPERTIES OF TRIANGLES | INTER 1st Prove that (a² + b² - c²) / (c² + a² - b²) = tan⁡B/tan⁡C | PROPERTIES OF TRIANGLES | INTER 1st