Determine o valor de
\( \cos \left( 2 \, arctg \left({\large{4 \over 3}} \right) \right) + \sin \left( 2 \, arctg \left({\large{4 \over 3}} \right) \right) \)
Determine o valor de
\( \cos \left( 2 \, arctg \left({\large{4 \over 3}} \right) \right) + \sin \left( 2 \, arctg \left({\large{4 \over 3}} \right) \right) \)
