Question 1114997
{{{ sec^2(theta)tan(theta) = 2tan(theta) }}} 
 {{{ tan(theta)(sec^2(theta)-2)=0 }}}
First part,
{{{tan(theta)=0}}}
{{{theta=0}}} and {{{theta=180}}}
Second part,
{{{sec^2(theta)-2=0}}}
{{{sec^2(theta)=2}}}
{{{sec(theta)=0 +- sqrt(2)}}}
{{{cos(theta)=0 +- 1/sqrt(2)}}}
{{{cos(theta)=0 +- sqrt(2)/2}}}
{{{theta=(1/4)pi}}}, {{{theta=(3/4)pi}}}, {{{theta=(5/4)pi}}}, and {{{theta=(7/4)pi}}}