Find the Value of Cosine on the Unit Circle

Home $ ext{Find the Value of Cosine on the Unit Circle}$ Answer 1 William King $text{Given the unit circle, we need to find the value of } cos(theta) text{ where } theta text{ is an angle such that } 2cos^2(theta) + cos(theta) – 1 = 0.$ $text{Step 1: Solve the...