1.= t^2+2tv+v^2
2.=m^2 - 2mn+n^2
3.=p^2+2p+1
4.=y^2 - 4y+4
5.=c^2 - 2cx+x^2
6.=9+6a+a^2
7.=Z^2 - 10z+25
8.=b^2+12b+36
все на фото и ответ и решение
<span>tg 21pi/4 +0.5 Sin 11pi/6 - Cos (-2pi/3) =
= tg(20</span>π + π/4) +0,5Sin(2π-π/6) - Cos2π/3= = tgπ/4 - 0,5*Sinπ/6 +1/2 =
=1 -1 +1/2 = 1/2