Practice Test 12

In right triangle $\triangle RST$, $\angle S$ is marked as $90^\circ$. The acute angles are labeled $\theta=\angle R$ and $\varphi=\angle T$. Which expression represents $\cos(\theta)$ in terms of $\sin(\varphi)$?

In the right triangle $\triangle ABC$ shown, $\angle C$ is a right angle, and the acute angles are labeled $\theta=\angle A$ and $\varphi=\angle B$. Which statement correctly relates $\sin(\theta)$ and $\cos(\varphi)$?