### Home > PC > Chapter 4 > Lesson 4.1.3 > Problem 4-41

4-41.

1. This is the 2nd quadrant.

2. Cosine is the *x*-value.

3. Cosine is negative in the 2nd quadrant.

1. Sine is *y*-value.

2. What are the side lengths?

3. Is it positive or negative?

2. Watch your signs!