Ap EapcetProperties Of TrianglesAP EAPCET 2024 - 21th May Evening ShiftMCQ+1 / -02024 In $\triangle A B C$, if $a=13, b=14$ and $\cos \frac{C}{2}=\frac{3}{\sqrt{13}}$, then $2 r_1=$A 2 SB $\Delta$C SD $2 \Delta$Check AnswerClear SelectionReveal AnswerShow Explanation