# Trigonometry Classwork Solutions

1. $x\in\left\lbrace\frac{7\pi}{18},\frac{11\pi}{18},\frac{19\pi}{18},\frac{23\pi}{18},\frac{31\pi}{18},\frac{35\pi}{18}\right\rbrace$
2. $x\in\left\lbrace\frac{\pi}{3},\frac{2\pi}{3},\frac{4\pi}{3},\frac{5\pi}{3}\right\rbrace$
3. $x\in\left\lbrace\frac{\pi}{12},\frac{5\pi}{12},\frac{7\pi}{12},\frac{11\pi}{12},\frac{13\pi}{12},\frac{17\pi}{12},\frac{19\pi}{12},\frac{23\pi}{12}\right\rbrace$
4. $x\in\left\lbrace\frac{5\pi}{18},\frac{11\pi}{18},\frac{17\pi}{18},\frac{23\pi}{18},\frac{29\pi}{18},\frac{35\pi}{18}\right\rbrace$
5. $x\in\left\lbrace\frac{\pi}{9},\frac{5\pi}{9},\frac{7\pi}{9},\frac{11\pi}{9},\frac{13\pi}{9},\frac{17\pi}{9}\right\rbrace$
6. $x\in\left\lbrace\frac{\pi}{6},\frac{3\pi}{4},\frac{5\pi}{6},\frac{7\pi}{4}\right\rbrace$
7. $x\in\left\lbrace\frac{\pi}{4},\frac{3\pi}{4},\frac{5\pi}{4},\frac{7\pi}{4}\right\rbrace$
8. $x\in\left\lbrace\frac{\pi}{3},\frac{2\pi}{3},\frac{4\pi}{3},\frac{5\pi}{3}\right\rbrace$
9. $x\in\left\lbrace 0,\frac{\pi}{6},\frac{2\pi}{3},\frac{5\pi}{6},\frac{4\pi}{3},\frac{3\pi}{2}\right\rbrace$
10. $x\approx 1.159$, $x\approx 5.124$