" In "Delta ABC" show that "r+r_(3)+r_(1)-r_(2)=4R cos B" ."

" (i) Show that "r+r_(1)+r_(2)-r_(3)=4R cos C

In Delta ABC , show that: (r_(1)+r_(2)) sec^(2) ""(C)/(2) = (r_(2) +r_(3)) sec^(2) ""(A)/(2) =(r_(3)+r_(1)) sec^(2)""(B)/(2)

In Delta ABC, r_1 r_2 =r r_3 =

Show that r r_1 r_2 r_3 = Delta^2

In a Delta ABC if r+r_(1)+r_(2)-r_(3)=lambda^(2)R cos C then lambda is

In Delta ABC , ( r_1-r)/( a) + ( r_2-r)/( b) =

In any Delta ABC, prove that r.r_(1).r_(2).r_(3)=Delta^(2)