Сейчас напишу #8 Б без графики извини
А) 4-4х=6х+9
-4х-6х=9-4
-10х=5
х= -0.5
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б) 8х+3=1-2х-4
8х+2х=1-4-3
10х=-6
х= -0.6
1) cos105cos5 + sin105cos85 = cos105cos(90-85) + sin105cos85 =
=cos105sin85 + sin105cos85 = sin(105+85) = sin190
2)sin195cos5 + cos195sin185 = sin195cos5 + cos195sin(180+5) =
=sin195cos5 - cos195sin5 = sin(195-5) = sin190
sin190/sin190 = 1
1) -5
2) -29
3) 4-D
4) 3 [0,7;0,8]
5) 1 - 6/11
6) 2 - 0,3