Хмашин на 1,х+18машин на 2,2*(2х+18)=4х+36машин на 3
х+х+18+2х+36=606
4х=606-54
4х=552
х=552:4
х=138машин на 1
2*138+36=312 машин на 3
606м-100%
312м-?
312*100:606=51 64/101% на 3 базе
1.cos^2(\pi+t)+cos^2(\pi-t)=
=cos(\pi+t)*cos(\pi+t)+cos(\pi-t)*cos(\pi-t)=
=(-cos(t))^2+(-cos(t))^2=2cos^2(t)
2. cos(2\pi-t)-sin(3\pi/2+t)=1
cost+cost=1
2cost=1
cost=1/2; t=\pi/3
3. sin(2\pi-t)-cos(3\pi+t)-1=0
-sint-cos(\pi+t)=-1
-sint+cost=-1
sint-cost=1
sint [-1;1]; cos[-1;1] => sint=1: cost=0
t=\pi/2
А) ax-bx/mx+nx =x*(a-b)\x*(m+n)=a-b\m+n
б) am-an/bm-bn=a*(m-n)\b*(m-n)=a\b