Question

What value of x in the interval 0 12 years ago

Answer 1

start with
\[\tan(x)=-\frac{1}{\sqrt3}\]

Answer 2

then see on the unit circle where that is the value for tangent
actually you will see the point on the unit circle where \(\cos(x)=\frac{\sqrt3}{2}\) and \(\sin(x)=\frac{1}{2}\)

Answer 3

if you do not have a unit circle handy, look at the last page of the attached cheat sheet

Answer 4

thank you!