### Home > INT3 > Chapter Ch12 > Lesson 12.1.2 > Problem 12-25

12-25.

For each of the following equations, what are the solutions that lie in the domain

You can either draw a unit circle to find all possible solutions, or solve the equation graphically.

In what quadrants is cos(

*x*) negative?

Picture a unit circle. At what angle is the adjacent side the same length as the hypotenuse?