= 10 ^ ( - 2) * ( 9 + 6 * 10 ^(-1) + 7 * ( 10^-2) = 10^ (-2) * ( 9 + 6 * 1\10 + 7 * 1\100 ) =
= 10^ (-2) * ( 9 + 0.6 + 0.07) = 10 ^ (-2) * 9.67 = 9.67 * 1\100 = 0.0967
2х+7/3=2*0,4+7/3=7,8/3=2,6
/-дробь(делить)
7cos (2x-π/3) = -3.5|:7
cos (2x-π/3) = -1/2
2x-π/3=+-(π-arccos1/2)+2πn, n∈Z
2x-π/3=+-2π/3+2πn, n∈Z
2x=+-2π/3+π/3+2πn, n∈Z |:2
x=+-π/3+π/6+πn, n∈Z
x1=π/2+πn, n∈Z x2=-π/6+πn, n∈Z
4 11/15+2 7/20=6+11/15+7/20=6+44/60+21/60=6+65/60=6+13/12=7 1/12
<span>(8.9+1.1-5)*2+48
1) (8.9+1.1-5)=10-5=5
2)5*2=10
3)10+48=58
Ответ 58</span>