Question$$\begin{array}{l} \csc \theta=\frac{16}{5} \\ \sin \theta=\frac{5}{16} \end{array}$$ (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.) $$\cos \theta=\square$$ (Simplify your answer, including any radicals. Use integers or fractions for any numbers in the expression.)