1. Cindy props a ladder up against a crooked tree in order to save a kitten that got stuck at the top. The ladder can get him 8ft up the tree. The ladder is 9ft long and is placed 4ft from the base of the tree. Solve for all of the angles inside the triangle the ladder creates with the tree and the ground.

9. (5 points) Find all the solutions of the equation in the interval [0, 2TT) 2cos x - 2sin x = 1