<span>sin(П-х)cos(3п/2-х)/-1+cos^2х=-sinx</span>sinx/-sin^2x=1
5x-(6x-(7x-(8x-9)))
5x-(6x-(7x-8x+9))
5x-(6x-7x+8x-9)
5x-6x+7x-8x+9
9-2x)
держи
1. ...= -4√а
2. ...= √26а
3. ...= √6 · √30= √180
4. ...= 3√12 + √24= 3√36= 3 · 6= 18
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