" 15.In "Delta ABC" ,If "(b)/(c^(2)-a^(2))+(a)/(c^(2)-b^(2))=0," then "

In Delta ABC, if (b-c)/(b+c)cot((A)/(2))+(b+c)/(b-c)tan((A)/(2))=2, then Delta ABC is (A) Right angled (B) Acute angled (C) Equilateral (D) Obtuse angled

Delta ABC,c^(4)-2(a^(2)+b^(2))c^(2)+a^(4)+a^(2)b^(2)+b^(4)=0 then the acute angle C=

In Delta ABC,(b^(2)+c^(2))/(b^(2)-c^(2))=(sin(B+C))/(sin(B-C)) then the triangle is

In triangle ABC,C=90^(@). Then (a^(2)-b^(2))/(a^(2)+b^(2))=

In triangle ABC,/_C=90^(@) then (a^(2)-b^(2))/(a^(2)+b^(2))=

In a Delta ABC if a^(2)sin(B-C)+b^(2)sin(C-A)+c^(2)sin(A-B)=0, then triangle is

In a Delta ABC if (a+b)cos((B)/(2))=b(a+c)cos((C)/(2)) then prove that the triangle ABC is isosceles.

In a triangle ABC if 2Delta^(2)=(a^(2)b^(2)c^(2))/(a^(2)+b^(2)+c^(2)) , then it is

In a triangle ABC if 2Delta^(2)=(a^(2)b^(2)c^(2))/(a^(2)+b^(2)+c^(2)) , then it is

In a triangle ABC if 2Delta^(2)=(a^(2)b^(2)c^(2))/(a^(2)+b^(2)+c^(2)) , then it is