Question

$arc cos(sin \frac{\pi}{5} )$
$arc \tan( \cot( \frac{3\pi}{7} )$
помагите пожалуйстааа

Answer 1

$\arccos(\sin(\frac{\pi}{5} ))=\frac{\pi}{2}-\arcsin(\sin(\frac{\pi}{5} )) = \frac{\pi}{2}-\frac{\pi}{5}=\frac{3\pi}{10}$

$\arctan(\cot(\frac{3\pi}{7}))=\arctan(\tan(\frac{\pi}{14})) = \frac{\pi}{14}$