2*√6*sin(8π/3)*cos(25π/4)=3.
1) sin(8π/3)=8*180°/3=sin480°=sin(360°+120°)=sin120°=√3/2.
2) cos(25π/4)=cos(25*180°/4)=cos(25*45°)=cos1125°=
=(3*360+45°)=cos45°=√2/2.
3) 2*√6*(√3/2)*(√2/2)=2*√6*√6/4=6/2=3.
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(x^2+9x+14)/x^2-49)=(x+7)(x+2)/(x-7)(x+7)=(x+2)/(x-7)
Нет действительных корней.
sin(пx/6)=-<span>√3/2</span>
<span>пx/6=(-1)^k+1 *п/3+пk</span>
<span>пx=(-1)^k+1 *2п+6пk</span>
<span>x=(-1)^k+1 *2п/п+6пk/п</span>