Prove that the area of triangle ABC= `1/2 ac sinB= 1/2 ab sinC= 1/2 bc sinA`

If P is the circumcentre of an acute angled triangle ABC with circumredius R. D is the midpoint of BC. Show that the perimetre of triangleABC = 2R(sinA + sinB + sinC) .

In a triangle ABC, the value of sinA+sinB+sinC is

If in a triangle ABC, sinA, sinB,sinC are in A.P., then

Prove that If A : B: C = 1: 2: 3 then sinA : sinB : sinC = 1:sqrt3:2

If in triangle ABC, cosA=(sinB)/(2sinC) , then the triangle is

If in triangle ABC, cosA=(sinB)/(2sinC) , then the triangle is

In a triangle ABC , prove that ,(sinA+sinB)/2lt=sin((A+B)/2)

In a triangle ABC, which of the following quantities denote the area of the triangles (a^2-b^2)/2(sinA sinB)/(sin(A-B))

In a triangle ABC, which of the following quantities denote the area of the triangles (a^2-b^2)/2(sinA sinB)/(sin(A-B))