CPM Homework Banner
12-25.
  1. For each of the following equations, what are the solutions that lie in the domain 0 ≤ x < 2π? Homework Help ✎

    1. 2sin(x) – 1 = 0

    2. 2cos(x) = –

    3. 2sin(x) =

    4. cos(x) = 1

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?