1) =cos(2*3π/4)=cos(3π/2)=0
2) =arcsin(sinπ)=π
3) =sin(2π/3)=(√3)/2
5/9+2/3=5/9+6/9=11/9= 1 2/9
17/1000+81/100= 17/1000+810/1000
5,9х + 2,9х = 27,28
8,8х = 27,28
х = 27,28 : 8,8
х = 3,1
5,9 · 3,1 + 2,9 · 3,1 = 27,28
<span>27,28 = 27,28
</span>
1. -9:(-9)=1
2. -21:(-7)=3
3. -3•(-66)=198
4. -9-19=-28
5. -6:8=0.75
6. 0.72(1.1+2.86)=2,8512
7. -7.1+7.68:1.2=-0.7
8. -0.6
9. -4,24
10. 5,37•1,3•3,72=25,96932 или 5.37-1.3-3.72=0.35