.~If u = → a × ( → b × → c ) + → b × ( → c × → a ) + → c × ( → a × → b )~

If a^2+b^2+c^2-a b-b c-c a=0, then (a) a+b=c (b) b+c=a (c) c+a=b (d) a=b=c

If loga/(b-c) = logb/(c-a) = logc/(a-b) , then a^(b+c).b^(c+a).c^(a+b) =

If loga/(b-c) = logb/(c-a) = logc/(a-b) , then a^(b+c).b^(c+a).c^(a+b) =

Show that: |(b+c)^2b a c a a b(c+a)^2c b a c b c(a+b)^2|=2a b c(a+b+c)^3

If a,b,c are in G.P then (b-a)/(b-c)+(b+a)/(b+c)=

If a,b,c are in H.P then prove that a/(b+c-a),b/(c+a-b),c/(a+b-c) are in H.P

The expression (a-b)^3+\ (b-c)^3+\ (c-a)^3 can be factorized as (a) (a-b)(b-c)(c-a) (b) 3(a-b)(b-c)(c-a) (c) -3\ (a-b)(b-c)(c-a) (d) (a+b+c)(a^2+b^2+c^2-a b-b c-c a)

If a, b, c are in HP., then a/(b+c),b/(c+a),c/(a+b) are in

The value of |(b +c,a,a),(b,c +a,b),(c,c,a +b)| , is

If in a triangle A B C angle B=90^0 then tan^2(A/2) is (b-c)/a (b) (b-c)/(b+c) (c) (b+c)/(b-c) (d) (b+c)/a