In `Delta ABC` with usual notations if `b=8,c=12,(BD)/(DC)=(3)/(2)` and `/_BAD=30^(@)` then length of `AD` is

In Delta ABC with usual notation, (c-b cos A)/(a) is equal to

In a DeltaABC ,with usual notations, (a)/(3)=(b)/(4)=(c)/(5) then triangle is

In Delta ABC with usual notation (r_(1))/(bc)+(r_(2))/(ca)+(r_(3))/(ab) is

In Delta ABC with usual notation (r_(1))/(bc)+(r_(2))/(ac)+(r_(3))/(ab) is:

In a Delta ABC with usual notations, if (a)/(cos A)=(b)/(cos B)=(c )/(cos C) , then the triangle is :

In a triangle ABC with usual notation,if a+b=3c, then tan((A)/(2))tan((B)/(2)) is equal to

In Delta ABC , with usual notations prove that : b^(2) = c^(2) +a^(2) - 2 ca cos B .

In a /_\ABC with usual notations a=3, b=4, c=5 then inradius is equal to

If in triangle ABC , with usual notations , a=18,b=24,c=30 , then sin.(A)/(2) is equal to

Given (b+c)/(11) = (c+a)/(12) = (a+b)/(13) for a Delta ABC with usual notation. If (cos A)/(alpha) = (cos B)/(beta) = (cos C)/(gamma) , then the ordered triad (alpha, beta, gamma) has a value: