Ts Eamcet
Properties Of Triangles
TS EAMCET 2022 (Online) 18th July Morning Shift
MCQ+1 / -02022
In a $\triangle A B C$, if $(b+c)^2 \sin ^2 \frac{A}{2}+(b-c)^2 \cos ^2 \frac{A}{2}=K(1-\cos 2 A)$, then $K=$
Ts Eamcet
TS EAMCET 2022 (Online) 18th July Morning Shift
In a $\triangle A B C$, if $(b+c)^2 \sin ^2 \frac{A}{2}+(b-c)^2 \cos ^2 \frac{A}{2}=K(1-\cos 2 A)$, then $K=$