How to solve

Instead of solving trigonometric equation, we would like to practice on how to rewrite an angle as sum/difference of two special angles or rewrite an angle as half of a special angle. Before that, let me list all the special angles in [0, 27t]: -= 45, = 60 OI 2 = 30, 2 TC 3 TC 5TC = 120, = 135, = 150 OII 3 4 6 = 210, STC 4 TC = 225 , = 240 OIII : - 4 3 117 57 - 300 7 7 = 315, = 330 OIV 6 3 TC = 270 on the coordinate axis : NIN =90, 7 = 180, Now rewrite the following angles as sum or difference of two special angles: 1) 75 2) 105 3) 195 4) 15 5) 165 6) 255 197 7) 75 8) 12 9) 12 Next, rewrite the following angles as half of a special angle: 1) 75 2) 15 3) 22.5 11x 4) 00 IN 5) TO 6) 12