A line is perpendicular to xy-plane Write the angle made by the line with z-axis.

Explanation

`sqrt((1+1)^2+(2-2)^2+(z-)^2=3)rArr4+(z-1)^2=9rArr(z-1)^2=9rArrz-1=_-^+sqrt5rArrz=1_-^+sqrt5`