p - пи
э - принадлежит
\э\ - не принадлежит
sin x - cos x - sin x * cos x = 1
sin x (1 - cos x - cos x) = 1
sin x = 1
x = p/2<span> +2p n, n э Z</span>
<span>n = 0</span>
<span> x = <span>p/2 , э [ -p ;p ];</span></span>
<span><span>n = 1</span></span>
<span><span>x = p/2 + 2p </span></span>, \э\ [-p ;p ];
n = 2
x = p/2 + 4p, \э\ [-p;p];
n = -1
x = p/2 - 2p, \э\ [-p;p];
n = -2
x = p/2 - 4p, \э\ [-p;p];
Ответ: x = p/2+2p n, n э Z; x = p/2;
1) 6ab
2) 12ac
3) 6a^2b
4) 75b^2c
5) 6(a+b)^4
6) 15(x+y)^5
7) 60(x-y)^3
8) 24(a-b)^4
Прикрепляю.......................................
4с^2-8c-c^2+8c-16=3c^2-16