Question

The greatest of $\tan 1,{\tan }^{-1}1,{\sin }^{-1}1,\sin 1,\cos 1$ is

• A. ${\sin }^{-1}1$
• B. $\tan 1$
• C. ${\tan }^{-1}1$
• D. none of these

Answer 1

Answer: (A)

$1$ Radian $=57^{\circ }17^{\prime }44.8^{\prime \prime }$
$\therefore {\sin }^{-1}1=\frac{\pi }{2}$ is the greatest.