A^2-3a , при а=5,6,0.1
5^2-3*5= 25-15=10
-6^2-3*(-6)=-36+18=-18
0.1^2-3*0.1=0.1^2-0.3
(3/22+2/11):5/33=(3/22+4/22):5/33=7/22:5/33=(7*33)/(22*5)=21/10=2,1
[{sinx <0 ; - sinx =sinx+2cosx .{sinx ≥ 0 ; sinx = sinx +cosx.
[ {sinx <0 ;tq x = -2 .{sinx ≥ 0 ; cosx = 0 .
[x = - arctq2 +2π*k ,k∈Z ; x =π/2 +2π*k ,k∈Z.
22.
а)левее 1,4554554
б)левее -12.0003
в)левее -1.56673
г)левее 13.00