In `Delta ABC` prove that (i)`a=bcosC+c cosB` (ii)` b=c cosA+acosC` (iii) `c=acosB+bcosA`

In Delta ABC prove that (i)a=b cos C+os B(ii)b=os A+a cos C(iii)c=a cos B+b cos A

(Projection Formulae) if a ,b ,c are the lengths of the sides opposite respectively to the angles A ,B ,C of a triangle A B C , show that a=bcosC+ccosB (ii) b=ccosA+acosC (iii) c=acosB+bcosA

In Delta ABC prove that (b+c)/a = (cosB + cosC)/(1-cosA)

In Delta ABC prove that (b+c)cosA + (c+a)cosB + (a+b)cosC = a+b+c

In DeltaABC , prove that: a(bcosC-(c)cosB)=b^(2)-c^(2)

In any Delta A B C , prove that: (cosA)/(bcosC+c cosB)+(cosB)/(c cosA+acosC)+(cosC)/(acosB+bcosA)=(a^2+b^2+c^2)/(2a b c)

In any DeltaABC , prove that a(bcosC-c cosB)=(b^(2)-c^(2))

In DeltaABC , prove that: c(acosB-b cosA)=a^(2)-b^(2)

In any Delta ABC , prove that a(bcosC-c""cosB)=b^(2)-c^(2) .

Prove that a(bcosC-c cosB)=b^2-c^2