In `DeltaABC,4Rrcos""A/2cos""B/2cos""C/2=`

In DeltaABC,cos^2""A/2+cos^2""B/2+cos^2""C/2=

In a DeltaABC, cos""(A)/(2)cos""(B)/(2)cos""C/(2) is

In a DeltaABC, cos""(A)/(2)cos""(B)/(2)cos""C/(2) is

In DeltaABC, 4R "cos"(A)/(2)"cos"(B)/(2)"cos"(B)/(2)=

Assertion A: In DeltaABC, sum(cos A)/(sin B sin C)=2 Reasin(R):In DeltaABC, sin A +sinB+sin C= 4"cos"A/2"cos"B/2"cos"C/2

If in a DeltaABC , cos A + 2 cosB+cosC= 2 , then a,b, c are in

If in a DeltaABC , cos A + 2 cosB+cosC= 2 , then a,b, c are in

In DeltaABC , prove that: cos2A+cos2B-cos2C=1-4sinAsinBcosC

In DeltaABC , prove that: cos2A+cos2B-cos2C=1-4sinAsinBcosC