<span>1) cos(3arctg(-1/</span>√<span>3))=cos(-3arctg 1/</span>√<span>3)=cos(3arctg 1/</span>√<span>3)=cos(3*</span>π/6)=cos π/2=0.<span>
2) sin(2arctg(-1))=sin(-2arctg 1)=-sin(2arctg 1)=-sin(2*</span>π/4)=-sin π/2=-1.
Х^2+100 равно 25-х^2 \-100\+х^2
2*х^2 равно -75 \ -75/2
х^2 равно 37,5
х равен корень из 37,5
х равен
Запишем
A(ω)<=1.8Α(0)=Α(0)*ω(ρ)^2/mod[ω(ρ)^2-ω^2]
Решим относительно ω
1.8Α(0)=Α(0)*ω(ρ)^2/mod[ω(ρ)^2-ω^2]
1.8Α(0)*ω(ρ)^2-1.8Α(0)*ω^2=Α(0)*ω(ρ)^2
0.8Α(0)*ω(ρ)^2=1.8Α(0)*ω^2
4Α(0)*ω(ρ)^2=9Α(0)*ω^2--->ω=(2/3)*ω(ρ)=2*300/3=200 c^(-1)<ω(ρ)
ω=200 c^(-1)