*79~80쪽-1.④ / 1-1.④ / 1-2.⑤ / 1-3.②, ③ / 1-4.0.3756 / 2.루트3/6 / 2-1.3루트3/2 / 2-2.⑤ / 3.⑤ / 3-1.③ / 3-2.⑤ / *81쪽-1.(1)0.5150, (2)0.8387, (3)0.6249, (4)0.5736, (5)0.8572, (6)0.6745 / 2.(1)64도, (2)62도, (3)63도 / 3.AB, 0.4848, 48.48 / *82쪽-4.30도 / 4-1.2도 / 4-2.1.0087 / 4-3.(1)④, (2)x=5.592, y=8.290, (3)⑤ / *83쪽-1.③, ⑤ / 2.1.38 / 3.-1 / 4.③ / 5.③, ⑤ / 6.② / 7.86도 / 8.73.14 / *84~86쪽-1.① / 2.15/17 / 3.루트5/5 / 4.③ / 5.20+4루트5 / 6.④ / 7.⑤ / 8.7/9 / 9.1/2 / 10.ㄴ, ㄷ / 11.루트3 / 12.③ / 13.8루트3/3 / 14.⑤ / 15.② / 16.1.4 / 17.2루트3 / 18.③ / 19.① / 20.1.3270 / 21.3/5 / 22.2-루트3 / 23.② / 24.2 sin x / *88쪽-1.(1)10, 10, 10, 5.7, (2)10, 10, 10, 8.2 / 2.(1)20, 20, 20, 15, (2)20, 20, 20, 25 / 지식맨을 이용해 주셔서 감사합니다.