SOLUTION: Find all t in the interval [0, 2π] satisfying (cos t)2 + 4 cos t + 3 = 0. (Enter your answers as a comma-separated list.)

Algebra ->  Trigonometry-basics -> SOLUTION: Find all t in the interval [0, 2π] satisfying (cos t)2 + 4 cos t + 3 = 0. (Enter your answers as a comma-separated list.)      Log On


   

Question 493016: Find all t in the interval [0, 2π] satisfying (cos t)2 + 4 cos t + 3 = 0. (Enter your answers as a comma-separated list.)
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Sub x for cos(t)
Solve for x
Sub cos(t) for x.