In a ` A B C ,` prove the following : `(c-b\ cos A)/(b-c\ cos A)=(cosB)/(cos C)`

In a Delta A B C , prove the following : (c-b\ cos A)/(b-c\ cos A)=(cosB)/(cos C)

In a Delta A B C , prove the following : \ a(cos B+cos C-1)+b(cos C+cos A-1)+c(cos A+cos B-1)=0 .

In any triangle A B C , prove that following: \ a\ (cosB cos C+cos A)=b(cos C\ cos A+cos B)=c(cos A\ cos B+cos C)dot

In a DeltaA B C , prove the following : a\ cos A+b\ cos B+c cos C=2bsinA sin\ Cdot

In a triangle Delta ABC , prove the following : 2 abc cos.(A)/(2) cos.(B)/(2) cos.(C )/(2) = (a+b+c)Delta

In any triangle A B C , prove that following: \ \ bcosB+c\ cos\ C="a c o s"(B-C)

In any triangle A B C , prove that following: \ (cos^2B-cos^2C)/(b+c)+(cos^2C-cos^2A)/(c+a)+(cos^2A-cos^2B)/(a+b)=0

In any triangle A B C , prove that following : (a+b)/c=(cos((A-B)/2))/(sin(C/2))

In any triangle A B C , prove that following: sin((B-C)/2)=(b-c)/a cos (A/2)

In any DeltaABC , prove that : (cos A)/(b cos C + c cos B) + (cos B)/(c cos A + a cos C) + (cos C)/(a cos B + b cos A) = (a^2 + b^2 + c^2)/(2abc)