### Home > PC > Chapter 4 > Lesson 4.2.1 > Problem 4-71

4-71.

What special angle(s) are involved?

What does the negative sign mean?

These angles are coterminal with the *y*-axis.

4-71.

What special angle(s) are involved?

What does the negative sign mean?

These angles are coterminal with the *y*-axis.