Spiegare gentilmente i passaggi, i ragionamenti e argomentare.
Analisi segno della derivata prima
0____π/2______π___5π/6____3π/2____11π/6____2π
0++++++++++0--------------------------------------0 2sinx
++++0-----------------------------0++++++++++++ cosx
+++++++++++++++++++++0++++++++++++ sinx+1
+++++++++++++++X++++++++++++X+++++ (2sinx+1)²
0+++0-----------0+++X+++++0------------X--------0 y'(x)
..↗.=....↘.....=.↗.X...↗...=....↘....X....↘... y(x)