Question

cos135градусов +ctg45 градусов

Answer 1

cos135=-0.1

ctg45=0.6

-0.1+0.6=0.5

Answer 2

$cos 135^0+ctg 45^0=cos (180^0-45^0)+1=-cos 45^0+1=-frac{sqrt{2}}{2}+1=frac{2-sqrt{2}}{2}$