(i)[1]
Determine angle $BAC$ in radians.
(ii)[5]
Determine the area of the shaded region $BDC$.
Mathematics 9709 · AS & A Level · Circular measure
Circular measure — practice question
The diagram depicts arc $BC$ of a circle centred at $A$ with radius $5\,\text{cm}$. The arc length $BC$ is $4\,\text{cm}$. Point $D$ is positioned so that $BD$ is perpendicular to $BA$ and $DC$ is parallel to $BA$.