<span>М(11п/4)
cos(11п/4) =-</span><span><span>√2/2</span>
sin(11п/4) = </span><span>√2/2
М(-41п/6)
cos(-41п/6) = -1/2
sin(-41п/6) = -</span><span>√3/2
М(117п)</span>
cos(117п) = -1
sin(117п) = 0
!!!!!!!!!!!!!!!!!!!!!!!!!!
<span>х-у=6
ху=216 х=6+у. Дальше сами решаете и у вас получиться 12 и 18!</span>
(x/3)⁻²=1/(x/3)²=1/(x²/9)=9/x²=(3/x)²