### Home > PC3 > Chapter 7 > Lesson 7.1.3 > Problem 7-42

7-42.

Use the diagram at right to calculate the exact values of the following trigonometric expressions. Homework Help ✎

Use the values given in the diagram.

Calculate the length of the base of the triangle. What should the sign be?

Use the information in the triangle and your calculated base from part (b).