第11章 11.10

(1)

$\sinθ = \frac{1}{2}$

第１象限、第２象限

$\frac{\pi}{6}, \frac{5}{6}\pi$

$\frac{\pi}{6} + 2n\pi ,\ \frac{5}{6}\pi + 2m\pi$

(2)

$\cosθ = -\frac{1}{2}$

第２象限、第３象限

$\frac{2}{3}\pi, \frac{4}{3}\pi$

$\pm\frac{2}{3}\pi + 2n\pi$

(3)

$\tanθ = \frac{1}{\sqrt{3}}$

第１象限、第３象限

$\frac{\pi}{6}, \frac{7}{6}\pi$

$\frac{\pi}{6} + n\pi$

(4)

$\tanθ = -1$

第２象限、第４象限

$\frac{3}{4}\pi, \frac{7}{4}\pi$

$\frac{3}{4}\pi + n\pi$

(5)

$\sinθ = -\frac{\sqrt{3}}{2}$

第３象限、第４象限

$\frac{4}{3}\pi, \frac{5}{3}\pi$

$\frac{4}{3}\pi + 2n\pi\ ,\ \frac{5}{3}\pi + 2n\pi$

(6)

$\cosθ = -\frac{\sqrt{3}}{2}$

第２象限、第３象限

$\frac{5}{6}\pi, \frac{7}{6}\pi$

$\pm\frac{5}{6}\pi + 2n\pi$