Question

ДАЮ 70 БАЛЛОВ!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

Объяснение:

$\frac{1-sin^2\alpha }{sin\alpha *cos\alpha }*tg\alpha +2*(sin^2\alpha +cos^2\alpha )=\frac{cos^2\alpha }{sin\alpha *cos\alpha } *tg\alpha +2*1=\\=\frac{cos\alpha }{sin\alpha } *\frac{sin\alpha }{cos\alpha } +2=1+2=3.$