Prove that : `4 RsinA sinB sinCC=acosA+bcos B+c cosC`

Prove that : 4\ R\ sin AsinB\ sin C=acosA+b\ cos B+c cosCdot

If A+B+C=pi/2 , prove that: sin2A + sin2B+sin2C = 4cosA cosB cosC

If A+B+C=pi , prove that : sinA+sinB+sinC= 4cos, A/2 cos, B/2 cos, C/2

In a triangle ABC , Prove that sin^4A+sin^4B+ sin^4C=3/2+2cosAcosBcosC+1/2cos2Acos2Bcos2C

If A+B+C=180 , prove that: sinA+sinB+sinC=4cos(A/2)cos(B/2)cos(C/2)

If A+B+C=pi , prove that : sin2A+sin2B+sin2C=4sinA sinB sinC

If A+B+C=pi , prove that : sinA cosB cosC +sinB cosC cosA + sinC cosA cosB = sinA sinB sinC .

If A+B+C=pi , prove that : cosA sinB sinC +cosB sinC sinA+cosC sinA sinB=1+cosA cosB cosC .

If (1+sinA)(1+sinB)(1+sinC)=(1-sinA) (1-sinB)(1-sinC)," then prove that "(1-sinA) (1-sinB)(1-sinC)=pmcosA.cosB.cosC .

In DeltaABC , prove that: sinA+sinB-sinC=4sinA/2sinB/2cosC/2