" (1) "(b+c)(b+d)=(c+a)(c+d)

If a,b,c,d are in GP then prove thst (b+c)(b+d) =(c+a)(c+d)

If a ,b,c , d are in G.P. prove that (b + c)(b + d) = (c + a)(c+d)

Suppose that a,b,c,d are in G.P with common ratio r Prove that (b+c)(b+d)=(c+a)(c+d)

If Set A= .{a, b, c, d} and R = { (a, a), (a, b), (a, c), (b, c), (b, d), (c, d),(d, a)} be a relation on set A, then R is :

If a ,\ b ,\ c ,\ d are in proportion, then (a) a b=c d (b) a c=b d (c) a d=b c (d) None of these

If (2a+3b)(2c-3d)=(2a-3b)(2c+3d) then (a)/(b)=(c)/(d)( b) (a)/(d)=(c)/(b)( c) (a)/(b)=(d)/(c)(d)(b)/(a)=(c)/(d)

If asin^2x+bcos^2x=c,bsin^2y+acos^2y=d and atanx=btany then a^2/b^2=........ (0ltx,yltpi/ 2) .............. A) ((b-c) (d-b))/((a-d) (c-a)) B) ((a-d ) (c-a))/((b-c) (d-b)) C) ((d-a) (c-a))/((b-c)(d-b)) D) ((b-c) (d-b))/((c-a) (a-d))

If a,b,c,d are four positive numbers then (A) ((a)/(b)+(b)/(c))((c)/(d)+(d)/(c)) =4.sqrt((a)/(c))(C)(a)/(b)+(b)/(c)+(c)/(d)+(d)/(e)+(e)/(a) =(1)/(5)