If ` cos (A+B) sin (C+D)= cos(A-B)* sin(C-D), ` then cot A cot B cot C =

If cos(A+B)sin(C+D)=cos(A-B)sin(C-D) , prove that cot A cot B cot C= cot D.

If cos(A+B)sin(C+D)=cos(A-B)sin(C-D) , prove that cot A cot B cot C=cotD .

If cos(A+B)sin(C+D)=cos(A-B)sin(C-D) , prove that cot A cot B cot C=cotD .

If cos(A+B)sin(C+D)=cos(A-B)sin(C-D) , prove that cot A cot B cot C=cotD .

In a triangle ABC,if sin A sin(B-C)=sin C sin(A-B), then prove that cot A,cot B,cot C are in A.P.

In a triangle ABC,if sin A sin(B-C)=sin C sin(A-B), then prove that cot A,cot B,cot C are in AP

(cos(A+B))/(cos(A-B))+(cos(C-D))/(cos(C+D))=0rArr cot A cot B cot C=

If A+B+C=pi and cos A = cos B cos C " then " cot B cot C =

sin(B+C-A),sin(C+A-B),sin(A+B-C)sin(B+C-A),sin(C+A-B),sin(A+B-C) are A.P., then cot A,cot B,cot C are in GP(b)HP(c)AP(d) none of these