Question

СРОЧНО РЕШИТЕ ОДИН ПРИМЕР ​

Answer 1

Ответ: 2,1;

Объяснение:

Answer 2

$\frac{Cos^{2}\beta+2}{Cos^{2} \beta+3Sin\beta Cos\beta }=\frac{Cos^{2}\beta+2Sin^{2}\beta+2Cos^{2}\beta}{Cos^{2} \beta+3Sin\beta Cos\beta }=\frac{3Cos^{2}\beta+2Sin^{2}\beta}{Cos^{2} \beta+3Sin\beta Cos\beta }= \\\\=\frac{\frac{3Cos^{2}\beta}{Cos^{2}\beta} +\frac{2Sin^{2}\beta}{Cos^{2}\beta}}{\frac{Cos^{2}\beta}{Cos^{2}\beta}+\frac{3Sin\beta Cos\beta}{Cos^{2}\beta}} =\frac{3+2tg^{2}\beta}{1+3tg\beta } =\frac{3+2*3^{2}}{1+3*3}=\frac{3+18}{1+9}=\frac{21}{10}=\boxed{2,1}$