Question

A line makes equal angles with co-ordinate axis. Direction cosines of this line are

Answer 1

$heya \\ \\ direction \: cosines \: are \\ \\ l {}^{2} + m {}^{2} + n {}^{2} = 1 \\ \\ l = m = n \\ \\ l = 1 \div \sqrt{3} \: \: \: or \: \: \: \: l = - 1 \div \sqrt{3} \\ \\ but \: direction \: cosines \: of \: a \: line \: are \: unique \:$