### Home > PC > Chapter 4 > Lesson 4.1.3 > Problem 4-40

4-40.

Draw and label a right triangle in the correct quadrant.

Calculate the length of the unknown side.

(Or you may know it because it is a Pythagorean Triple!) When you label it, think about if it should be positive or negative.

From the side lengths, you can find the cos(*θ*) and the tan(*θ*).