Question 593967
Arctan (2cos30)
Since cos(30) = {{{sqrt(3)/2}}} this becomes:
{{{Arctan (2(sqrt(3)/2))}}}
which simplifies to:
{{{Arctan (sqrt(3))}}}
This represents the angle between -90 and 90 whose tan is {{{sqrt(3)}}}. The only angle between -90 and 90 whose tan is {{{sqrt(3)}}} is 60.