ответ: =3
Объяснение:
sin(π/4)=√2/2 =>√2sin(π/4)=2/2=1
cos(-π/4)=cos(π/4)= √2/2 =>√2cos(-π/4)=2/2=1
3tg45°=3
=>√2 sin π/4 -√2 cos( -π/4) + 3tg45° =1-1+3=3
