In `triangle ABC` , prove that (1) `a=b cos C+c cos B` (2) `b=a cos C+c cos A`.

In any triangle ABC, prove that : a (b cos C-c cos B) = b^2 -c^2 .

In any triangle ABC ,prove that (a-b cos C)/( c-b cos A ) = (sin C ) /( sin A)

In triangle ABC , prove that (b+c)cos A +(c+a)cos B +(a+b)cos C=a+b+c .

For any triangle ABC,prove that a(b cos C-c cos B)=b^(2)-c^(2)

In any triangle ABC, prove that : a (cos C - cos B) = 2 (b-c) cos^2 frac (A)(2) .

In any triangle ABC, prove that: a cos A+b cos B+c cos C=2a sin B sin C

In any Delta ABC, prove that :a(b cos C-c cos B)=b^(2)-c^(2)

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

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

In any triangle ABC, prove that a^(3) cos(B - C) + b^(3) cos (C - A) + c^(3) cos (A - B) = 3 abc