9. Geometry

Given the right triangle below, evaluate $\cos \theta$.

Given the right triangle below, evaluate $\tan \theta$.

A right triangle with an angle of $31°$ has a hypotenuse of $10$. Calculate the side of the triangle opposite to the $31°$ angle (y), and the side adjacent to the $31°$ angle (x). Round your answer to 3 decimal places.

Given the right triangle below, use the sine function to write a trigonometric expression for the missing angle $\theta$.