Question

2•cos30° - ctg30° = ?

Answer 1

2*cos30-ctg30=2*√3/2-√3=2√3/2-√3=√3-√3=0

Answer 2

$2* \frac{ \sqrt{3} }{2} - \frac{ \sqrt{3} }{1} = \sqrt{3} - \sqrt{3} =0$