CPM Homework Banner

For each of the following equations, find the solutions that lie in the domain .

  1. For the equation to be true,  must .

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

  2. In what quadrants is cos negative?

  3. When does ?

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