Ameline

Come giudichi # Tan ((3pi) / 4) #? Risposta: #tan((3pi)/4)=-1# Spiegazione: #(3pi)/4=pi-pi/4# #a=pi# #b=pi/4# #tan(a-b)=(tan a-tan b)/(1+tan a*tan b)# #tan((3pi)/4)=(tan pi-tan (pi/4))/(1+tan pi*tan (pi/4)# #tan((3pi)/4)=(0-1)/(1+0*1)# #tan((3pi)/4)=-1/1# #tan((3pi)/4)=-1#