`(cos(A-B))/(cos(A+B))+cos(C+D)/(cos(C-D))=0 => tan A tan B tan C tan D =`

If (cos(A-B))/(cos(A+B))+(cos(C+D))/(cos(C-D))=0, prove tht tan A tan B tan C tan D=-1

(cos (AB)) / (cos (A + B)) + (cos (C + D)) / (cos (CD)) = 0rArr tan A tan B tan C tan D =

If (cos (AB)) / (cos (A + B)) + (cos (C + D)) / (cos (CD)) = 0 Prove that tan A tan B tan C tan D = -1

If cos2B=(cos(A+C))/(cos(A-C)) , then tan A, tan B, tan C are in

If ( cos (A+B))/( cos (A-B)) =( sin (C+D))/( sin (C -D)) then prove that tan A tan B tan C + tan D=0 ................. A) 0 B) -1 C) sqrt3 D) 1

If cos2B=(cos(A+C))/(cos(A-C)), then tan A,tan B,tan C are in

If cos 2B=(cos (A+C))/(cos(A-C)) , then tan A , tan B , tan C are in

If cos 2 B=(cos (A+C))/(cos (A-C)), then tan A, tan B , tan C are in

If cos2B=(cos(A+C))/(cos(A-C)) , then tan A , tanB,tan C are in