`cosAsin(B-C)+cosBsin(C-A)+cosCsin(A-B)=0`

In A B C , if (sinA)/(csinB)+(sinB)/c+(sinC)/b=c/(a b)+b/(a c)+a/(b c), then the value of angle A is 120^0 (b) 90^0 (c) 60^0 (d) 30^0

If a+b+c=0, a,b,c in Q then roots of the equation (b+c-a) x ^(2) + (c+a-c) =0 are:

L_1=(a-b)x+(b-c)y+(c-a)=0L_2=(b-c)x+(c-a)y+(a-b)=0L_3=(c-a)x+(a-b)y+(b-c)=0 KAMPLE 6 Show that the following lines are concurrent L1 = (a-b) x + (b-c)y + (c-a) = 0 12 = (b-c)x + (c-a) y + (a-b) = 0 L3 = (c-a)x + (a-b) y + (b-c) = 0. ,

In triangle ABC (Figure), which of the following is not true: (A) -> A B+ -> B C+ -> C A= ->0 (B) -> A B+ -> B C- -> A C= ->0 (C) -> A B+ -> B C- -> C A= ->0 (D) -> A B- -> C B+ -> C A= ->0

If a + b + c = 0, then one of the solution of |(a-x,c,b),(c,b-x,a),(b,a,c-x)| = 0 is

If a,b,c are in G.P. then the value of |(a,b,a+b),(b,c,b+c),(a+b,b+c,0)|= (A) 1 (B) -1 (C) a+b+c (D) 0