### Home > PC > Chapter 4 > Lesson 4.3.2 > Problem 4-138

4-138.

Find all values of where

*.*

Cosine is the

-value. Where on the unit circle is?

What

gives a tangent of or ?

What quadrants would the tangent be?

Change the

to /sin .

4-138.

Find all values of where

Cosine is the

-value. Where on the unit circle is?

What

gives a tangent of or ?

What quadrants would the tangent be?

Change the

to /sin .