In a triangle ABC prove that `r_1r_2r_3=r^3 cot^2 (A/2). cot^2 (B/2).cot^2(C/2)`

In a Delta ABC prove that r_(1)r_(2)r_(3)=r^(3)cot^(2)((A)/(2))cot^(2)((B)/(2))cot^(2)((C)/(2))

In a triangle ABC, prove that r^2+r_1^2+r_2^2+r_3^2=16R^2-a^2-b^2-c^2.

In any triangle ABC prove that cot(A/2)+cot(B/2)+cot(C/2)=cot(A/2)cot(B/2)cot(C/2)

In any triangle ABC, prove that: (b-c)cot(A)/(2)+(c-a)cot(B)/(2)+(a-b)cot(C)/(2)=0

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

In a triangle ABC,prove that (cot((A)/(2))+cot((B)/(2))+cot((C)/(2)))/(cot A+cot B+cot(C))=((a+b+c)^(2))/(a^(2)+b^(2)+c^(2))

In any triangle ABC , prove that a(cosB+cot(A/2).sinB)=b+c .

Show that r_(1)+r_(2)=c cot ((C)/(2))

For any triangle ABC, prove that (b^(2)c^(2))cot A+(c^(2)a^(2))cot B+(a^(2)b^(2))cot C=

Show that r_(1)+r_(2)=c cot((C)/(2))