1) 40:(-8)=-5
2)0,3×(-4)=1,2+1=2,2
С:48,. с=208800
208800:48=4350
С:48,. с=259584
259584:48=5408
С:48,. с=106320
106320:48=2215
С:48,. с=175632
175632:48=3659
У'<span> = (sin </span>х)'<span> = cos </span>х;
<span>y" </span><span> = (cos </span>х)'<span> = — sin </span>x<span>.</span>
7/8*9/28=9/32
сокращаем 7 и 28 получаем 1 и 4,4*8+32, 1*9=9
Tg 5x = sqrt(3)
5x = arctg sqrt((3) + Pi*k, k прин Z
5x = Pi/3 + Pi*k, k прин Z
x = Pi/13 + Pi*k/5, k прин Z
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2cos(x + Pi/4) = sqrt(2)
cos(x + Pi/4) = sqrt(2)/2
x + Pi/4 = +- arccos(sqrt(2)/2) + 2Pi*k, k прин Z
x + PI/4 = +- Pi/4 + 2Pi*k, k прин Z
x = +- Pi/4 - Pi/4 + 2Pi*k, k прин Z
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8sin^2(x) + 4cos^2(x) - 7 = 0
8sin^2(x) + 4(1 - sin^2(x)) - 7 = 0
8sin^2(x) + 4 - 4sin^2(x) - 7 = 0
4sin^2(x) - 3 = 0
4sin^2(x) = 3
sin^2(x) = 3/4
1. sinx = sqrt(3)/2
x = (-1)^k arcsin(sqrt(3)/2) + Pik, k прин Z
x = (-1)^k Pi/3 + Pik, k прин Z
2. sinx = -sqrt(3/2)
x = (-1)^k arcsin(-sqrt(3)/2) + Pik, k прин Z
x = (-1)^(k+1) arcsin(sqrt(3)/2) + Pik, k прин Z
x = (-1)^(k+1) Pi/3 + Pik, k прин Z