第1章 1.5

(1)

$\sin^{-1}0=0$

(2)

$\cos^{-1}(-1)=\pi$

(3)

$\tan^{-1}1=\frac{\pi}{4}$

(4)

$\sin^{-1}\frac{1}{\sqrt{2}}=\frac{\pi}{4}$

(5)

$\cos^{-1}\frac{\sqrt{3}}{2}=\frac{\pi}{6}$

(6)

$\tan^{-1}\frac{1}{\sqrt{3}}=\frac{\pi}{6}$

(7)

$\sin^{-1}\left(-\frac{1}{2}\right)=-\frac{\pi}{6}$

(8)

$\cos^{-1}\left(-\frac{1}{2}\right)=\frac{3}{4}\pi$

(9)

$\tan^{-1}(-\sqrt{3})=-\frac{\pi}{3}$