In a triangle `A B C ,` prove by vector method that `a/(sinA)=b/(sinB)=c/(sinC)`

If A ,Ba n dC are the vetices of a triangle A B C , then prove sine rule a/(sinA)=b/(sinB)=c/(sinC)dot

If A ,Ba n dC are the vetices of a triangle A B C , then prove sine rule a/(sinA)=b/(sinB)=c/(sinC)dot

If a ,b ,c are the lengths of sides, B C ,C A and A B of a triangle A B C , prove that vec B C+ vec C A+ vec A B= vec O and deduce that a/(sinA)=b/(sinB)=c/(sinC)dot

In any triangle A B C , prove that: (a^2sin(B-C))/(sinB+ sin C)+(b^2sin(C-A))/(sinC+ sin A)+(c^2sin(A-B))/(sinA+ sin B)=0

In any triangleABC , prove that (sqrt(sinA)-sqrt(sinB))/(sqrt(sinA) + sqrt(sinB)) = (a+b-2sqrt(ab))/(a-b) [Hint : (a-b)^(2) = a^(2)+b^(2)-2ab ]

In a triangle A B C prove that a//(a+c)+b//(c+a)+c//(a+b)<2

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

For any triangle ABC, prove that (a+b)/c=(cos((A-B)/2))/(sinC/2)

For any triangle ABC, prove that (a+b)/c=(cos((A-B)/2))/(sinC/2)

In any triangle A B C , prove the projection formula a=b cosC+c cosB using vector method.