If `sinA+sinB+sinC=3`. Then: `cosA+cosB+cosC=` (a) 0 (b) 1 (c) 2 (d) 3

If sinA+sinB=a and cosA+cosB=b,then cos(A+B)

If sinA+sinB=a and cosA+cosB=b,then cos(A+B)

If sinA+sinB+sinC=3 , then the value of cosA+cosB+cosC is equal to

Let ABCD be a cyclic quadrilateral then Statement:1 sinA + sinB+ sinC + sinD=0 and Statement:2 cosA + cosB + cosC + cosD=0

Let ABCD be a cyclic quadrilateral then Statement:1 sinA + sinB+ sinC + sinD=0 and Statement:2 cosA + cosB + cosC + cosD=0

If sinA=sinB and cosA=cosB , then prove that sin. (A-B)/(2)=0 .

If sinA+sinB=C,&cosA+cosB=D , then sin(A+B)=?

If sinA+cosB=a and sinB+cosA=b then sin(A+B)=