3-(4x<em>*2-177*2)=3-8x+354 3-8x+354=0 -8x=-354-3 -8x=-357 x=44.625</em>
См фото
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3sin2x – 3sinx cosx – 4cos2x = -2;
1,5*sin(2*x)-4*cos(2*x)+2=0;
3*sin(x)*cos(x)-2*(cos(x))^2+6*(sin(x))^2=0;
cos(x)= не рвно нулю.
6*(tg(x))^2+3*tg(x)-2=0;
tg(x1)=0,5*(-3+57^0,5);
tg(x2)=0,5*(-3-57^0,5);
Решение
(а(x-y) - b(x-y)) / (x(a-b) + 2y(a-b)) = (x-y)(a-b)) / ((a-b)(x+2y)) = (x-y) / (x+2y)
Если х = 1,2 и y = -0,1 то (1,2 -(-0,1)) / (1,2+2*(-0,1)) = 1,3 / 1 = 1,3
(х-3)(-3)=0
х=3
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