### Home > PC3 > Chapter 2 > Lesson 2.3.3 > Problem 2-155

2-155.

State the *exact* value of each of the following trigonometric expressions without using a calculator or referring to your unit circle.

What is

?

2-155.

State the *exact* value of each of the following trigonometric expressions without using a calculator or referring to your unit circle.

What is

?