Mathematics - Sequence & Series Question with Solution | TestHub

$\Delta =\frac{1}{2}{p}_{1}a=\frac{1}{2}{p}_{2}b=\frac{1}{2}{p}_{3}b$ $p_1,p_2,p_3$ are in H.P. $\Rightarrow \frac{2\Delta }{a},\frac{2\Delta }{b},\frac{2\Delta }{c}$ are in H.P. $\Rightarrow \frac{1}{a},\frac{1}{b},\frac{1}{c}$ are in H.P $\Rightarrow a,b,c$ are in A.P. $\Rightarrow \sin A,\sin B,\sin C$ are in A.P.