### Home > PC > Chapter 4 > Lesson 4.3.2 > Problem 4-137

4-137.

Find the *exact*value of each of the following without using a calculator or your unit circle. Homework Help ✎cos

tan

−1

4-137.

Find the *exact*value of each of the following without using a calculator or your unit circle. Homework Help ✎cos

tan

−1