Question

cos60+2sin60+tg45-ctg30

Answer 1

$cos60= frac{1}{2}\ sin60= frac{sqrt{3}}{2}\ tg45=1\ ctg30= sqrt{3}\ frac{1}{2}+frac{2*sqrt{3}}{2}+1-sqrt{3}= frac{3}{2}+frac{2sqrt{3}}{2}-sqrt{3}= frac{3+2sqrt{3}-2sqrt{3}}{2}= frac{3}{2}=1.5$

Answer 2

спасибо.