Mathematics - Vector Question with Solution | TestHub

$ABC$ is a triangle, right angled at $A$. The resultant of the forces acting along $\overrightarrow{AB},\overrightarrow{AC}$ with magnitudes $\frac{1}{AB}$ and $\frac{1}{AC}$ respectively is the force along $\overrightarrow{AD}$, where $D$ is the foot of the perpendicular from $\mathrm{A}$ onto $\mathrm{BC}$. The magnitude of the resultant is