1ц=100кг
19,5ц*100=1950кг
1950кг:1,3кг=1500 булок хлеба
Sina^2+cosa^2=1
<span>sina^2=0.64 </span>
<span>sina=+-0.8 </span>
<span>т.к. П<а<2П,то sina=-0.8</span>
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Номер 332
(m+4)^2= m^2+8-16
(c-b)^2= c^2-2cb+b^2
(x+y)^2= x^2+2xy+y^2
(p+q)^2= p^2+2pq+q^2
(a-3)^2 = a^2-6a+9
(b+4)^2= b^2+8b+16
(-2-a)^2= 4-4a+a^2