<span>сos(2п-t)= Сos t
sin(3п/2+t) = - Sint
сtg(270-a) = tg t</span>
+ - +
_________(-3)___________[17]__________
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x ∈ (- 3 ; 17]
1) 5(25-125-625)
2) хз
3) 3(9-27-81-243)
4) хз
<span>(x+y)*(x-y)*(x²-y²)=(х²-у²)(х²-у²)=х⁴-2х²у²+у⁴</span>
X{2}-6/x*(x+2){2} {} - это в квадрате.