code class$=$"asciimath"$>$Solve $\backslash$sqrt$(2)$cos$^(2)2$x$-$cos$2$x$=0$ if x$<mn>2</mn><mi>\backslash </mi>$pi $.$ Answer as an exact value. x$=(\backslash$pi $)/(4),$x$=(3\backslash$pi $)/(4)$ x$=(\backslash$pi $)/(2),$x$=(19\backslash$pi $)/(4),$x$=(2\backslash$pi $)/(6)$ x$=\backslash$pi $,$x$=(3\backslash$pi $)/(4),$x$=2\backslash$pi $,$x$=(7\backslash$pi $)/(4)$ x$=(\backslash$pi $)/(4),$x$=(3\backslash$pi $)/(4),$x$=(5\backslash$pi $)/(4),$x$=(7\backslash$pi $)/(4),$x$=(\backslash$pi $)/(8),$x$=(7\backslash$pi $)/(8),$x$=(9\backslash$pi $)/(8),$x$=(15\backslash$pi $)/(8)$