⇢ AG
Anar Guliev
МВ
Маргарита Васильева
Ответ. 5*(sin(a))^2+11*(cos(a))^2=7; 11-6*(sin(a))^2=7;
(sin(a))^2=2/3; (tg(a))^2=((sin(a))^2)/(1-(sin(a))^2);
(2/3)/(1-(2/3))=2;
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Ответ. 5*(sin(a))^2+11*(cos(a))^2=7; 11-6*(sin(a))^2=7;
(sin(a))^2=2/3; (tg(a))^2=((sin(a))^2)/(1-(sin(a))^2);
(2/3)/(1-(2/3))=2;