<span>SIn(200 arcsin(-0.5))=sin(-200arcsin 0,5)=-sin(200</span>π/6)=-sin(100π/3)=
=-sin(34π-2π/3)=-sin(-2π/3)=sin(2π/3)=√3/2.
Е) 1 2/7*2 3/5*2 1/4=9/7*13/5*9/4=1053/140
5 2/5*1 6/7*1/4=27/5*13/7*1/4=351/140
1053/140:351/140=1053/140*140/351=3
ж) 12 4/5*3 3/4=64/5*15/4=48
4 4/11*4 1/8=48/11*33/8=18
48-18=30
11 2/3:7/18=35/3:7/18=35/3*18/7=30
30:30=1