Sin(π - t) + cos(3π/2 + t) > - √3
sint + sint > - √3
2sint > - √3
sint > - √3/2
arcsin(-√3/2) + 2πn < t < π - arcsin(-√3/2) + 2πn, n∈Z
-π/3 + 2πn < t < π -( - π/3) + 2πn, n∈Z
-π/3 + 2πn < t < (4π/3) + 2πn, n∈Z
<span>х²<span>-</span><span>16<span>=</span>0</span></span>
<span>х²</span>=16
х=+-4
ответ:+-4
<em>-3x^2+7,</em> при x=-5
1) -3*(5)^2+7 = -75 + 7 = -68
Ответ:<u>-68</u>
D = 4 + 4*4 = 16 + 4 = 20
√D = √4*5 = 2√5
x1 = ( - 2 + 2√5)/2 = √5 - 1
x2 = ( - 2 - 2√5)/2 = - √5 - 1