C-10-Q080mediumsingle_mcqSolving for the standing piece, xxx equals—a10⋅tan30∘10 \cdot \tan 30^\circ10⋅tan30∘b10tan30∘\dfrac{10}{\tan 30^\circ}tan30∘10c10⋅sin30∘10 \cdot \sin 30^\circ10⋅sin30∘d10sin30∘\dfrac{10}{\sin 30^\circ}sin30∘10