### Home > PC > Chapter 4 > Lesson 4.2.3 > Problem4-104

4-104.
1. Find the exact value of each of the following trig expressions without using a calculator. Homework Help ✎

1. cos

2. sin

3. sec

4. tan

Draw a unit circle with reference angle.

Follow the hint in part (a).

$\sec(\theta)=\frac{1}{\cos(\theta)}$

Follow the hint in part (a).