Question

дам 20 баллов )!!!!!рршшш

Answer 1

$Cos^{2}\alpha+tg^{2}\alpha*Cos^{2}\alpha =Cos^{2}\alpha+\frac{Sin^{2}\alpha}{Cos^{2}\alpha}*Cos^{2}\alpha=Cos^{2}\alpha+Sin^{2}\alpha=1\\\\Otvet:\boxed{1}$