Please help me with these problems. I really need it!

rmula: sin2 a = 1-cos 20 and cos2 o = 1+cos 20 2 Review & Preview 6-109. If cos x = - 3, XE[, 2 ], find exact values for sin 2x, cos 2x, sin (*), and cos ( 2). Start by drawing a triangle that where cos x = 4 , find the missing sides and then determine if the value of the function you are using in the formulas is positive or negative based on the location of the angle. 6-110. Solve the following trigonometric equation on [0, 27 ]: 3 sin x = 1. 6-111. Rewrite each trig expression in a simpler form using trigonometric identities. a. 2 sin 5 p cos 5 p b. sin T cos T - cos T sin T 6-112. Graph y = (x-1)(x+ 3) . For what values of x is the graph less than or equal to zero? Express your answer as an inequality (example: x > 2, 1 S x $ 4). Was the factored form of the equation easy to graph? Do you see a connection between the equation, the factors, and the solution? 303 Chapter 6: Extending Periodic Functions