If `x, y, z` are in A.P., then `(x + 2y - z) (2y + z - x) (z + x - y) = kxyz`,where `k in N`, then k is equal to

If x + y + z = 0 , then ( x + y - z)^(3) + ( y + z - x)^(3) + (z + x - y) ^(3) = k (xyz) , where k is equal to :

If x,y,z are in A.P, then ( sin x - sin z)/( cos z - cos x) is equal to

If x,y , z are in A.P then (x-y)/(y-z) is equal to _________-

If x^(2),y^(2),z^(2) are in AP, then y+z,z+x,x+y are in

If x + y + z =1 and x, y, z are positive numbers such that (1 – x) (1 – y) (1 – z) gt= kxyz, then k =

If (x)/(2x+y+z) =(y)/(x+2y+z) =(z)/(x+y+2z) then each terms is equal to

The lines x + y + z - 3 = 0 = 2x - y + 5z - 6 and x - y - z + 1 = 0 = 2x + 3y + 7z - k are coplanar then k equals