`sqrt(r r_1 r_2 r_3)/(2Rr(sin A+sin B+sin C))=`

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) ) =

(sqrt (rr_ (1) r_ (2) r_ (3))) / (2Rr (sin A + sin B + sin C) =)

In Delta ABC, R^2 (sin 2A+ sin 2B+ sin 2C)=

If A is the area and 2s is the sum of the sides of a triangle,then A<=(s^(2))/(4) (b) A<=(s^(2))/(3sqrt(3))2R sin A sin B sin C( d) none of these

In Delta ABC , R^(2) ( sin 2A +sin 2B+ sin 2C) =

In/_ABC,R^(2)(sin2A+sin2B+sin2C)=

Verify area of triangle is (i) abc/4R (ii) 2R^(^^)2 sinA sin B sin C