tg 5п делить на 4 * cos 11p делить 6 * sin 4p делить 3

tg 5π/ 4 * cos 11π/ 6 * sin4π/ 3=tg(π+π/4)·cos(2π-π/6)·sin(π+π/3)=
=-tgπ/4·cosπ/6·(-sin(π/3))=1·√3/2·√3/2=3/4=0,75