In a triangle,if the angles are in the ratio $3: 2: 1$,then the ratio of its sides is

In a $\Delta ABC$,if two sides $b$ and $c$ and an angle $B$ are given.
Statement $-1$: Let $b = 5 \ cm, c = 3 \ cm$ and $\angle B = 60^\circ$. The total number of possible triangles is $2$.
Statement $-2$: If $c \sin B < b < c$ and $B$ is an acute angle,then there are two possible values of $\angle C$.

In a triangle $ABC$,with usual notations $a=2, b=3, c=5$,then $\frac{\cos A}{a}+\frac{\cos B}{b}+\frac{\cos C}{c}=$

In a $\Delta ABC$,if $\frac{\cos A}{a}=\frac{\cos B}{b}=\frac{\cos C}{c}$ and $a=2$,then its area is

In $\triangle ABC$,if $a: b: c = 4: 5: 6$,then $\cos A: \cos B: \cos C =$

Let $ABC$ be an acute-angled triangle and let $D$ be the mid-point of $BC$. If $AB = AD$,then $\tan(B) / \tan(C)$ equals