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  4. The greatest of tan 1, tan -1 1, sin -1 1, sin 1, cos 1 is

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

Inverse Trigonometric Functions

Solution:

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