Question 1091251
{{{ tan( theta ) = -1/sqrt(3) }}}
The tan function is negative in the 2nd and 4th quadrants
{{{ arctan( -1/sqrt(3)) = -30 }}} degrees and also
{{{ arctan( -1/sqrt(3)) = 150 }}} degrees
so {{{ theta = 330 }}} and {{{ theta = 150 }}}
check the math