((sin 130 + cos 20)/ (cos 130 + cos 110))* корень из 3
((sin 130 + cos 20)/ (cos 130 + cos 110))* sqrt(3)=
(2cos30cos10)/(2cos120cos10)*sqrt(3)=cos30/cos120*sqrt(3)=cos30/(-sin30)*sqrt(3)=-ctg30*sqrt(3)=-sqrt(3)*sqrt(3)=-3
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((sin 130 + cos 20)/ (cos 130 + cos 110))* sqrt(3)=
(2cos30cos10)/(2cos120cos10)*sqrt(3)=cos30/cos120*sqrt(3)=cos30/(-sin30)*sqrt(3)=-ctg30*sqrt(3)=-sqrt(3)*sqrt(3)=-3