1) 24+32=56(кг)-всего
2)56/8=7(ящ)-надо
1)24/8=3(ящ)
2)32/8=4(ящ)
3)3+4=7(ящ)
1)-5.3 6.1 -0.8 0.7
2)-2.5 3.8 14.9 -3.01 -3
Sin^2 x+sin^2 2x=1
<span>sin^2 2x=1-sin^2 x </span>
<span>sin^2 2x=cos^2 x </span>
<span>4sin^2 x * cos^2 x=cos^2 x </span>
<span>cos^2 x*(4sin^2 x-1)=0 </span>
<span>1) cosx=0 </span>
<span>x=пи/2+пи*n, n - целое </span>
<span>2) 4sin^2 x-1=0 </span>
<span>2(1-cos2x)-1=0 </span>
<span>-2cos2x+1=0 </span>
<span>cos2x=1/2 </span>
<span>2x=+-пи/3+2пи*n, </span>
<span>x=+-пи/6+пи*n, n - целое </span>
<span>Ответ: x=пи/2+пи*n, x=+-пи/6+пи*n, n - целое</span>