Question

помогите!!!!!
вычислите: 

Answer 1

sin(7п/4)*сos(7п/6)*tg(5п/3)*сtg (4п/3)=-√2/2*√2/2*√3*√3/3=-1
sin (7п/4)=-√2/2
сos(7п/6)=√2/2
tg(5п/3)=√3
сtg (4п/3)=√3/3