`sqrt(rr_1 r_2 r_3)/(2R r(sinA+sinB+sinC)=`

In DeltaABC,sqrt(rr_1r_2r_3)/(2Rr(sinA+sinB+sinC)) =

In Delta ABC , (sqrt( r r_1r_2r_3))/( 2Rr ( sin A + sin B + sin C) ) =

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) .

if A, B, C are acute positive angles, then : ((sinA + sinB)(sinA + sinC)(sinA + sinC))/(sinA sinB sinC) is :

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

In DeltaABC , prove that: a) (sin2A + sin2B + sin2C)/(sinA+sinB+sinC) = 8sinA/2 sinB/2sinC/2

(1+sinA)(1+sinB)(1+sinC) = (1-sinA)(1-sinB)(1-sinC) = k rArr k =