\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
<span>2sin3x=-1
</span>
<span>sin3x=-1/2
</span>
<span>3x=7п/6 +2пn
x=7п/18+2пn/3
</span>
Y=2x
координаты x=0 y=0; x=1 y=2;...
Y=2x+55 x=0 y=55; x=1 y=57...
sin A = 7/25 = BC/AB
Т.е Bc/ab = 7/25
BC /9,6 = 7/25
Bc = 2,688
BС = AC значит AC = 2,688 По-моему так