Question 390450
The equation simplifies to


{{{cos (2x) - sin (2x) = 0}}}


{{{cos (2x) = sin (2x)}}}


{{{tan (2x) = 1}}}


{{{2x = pi/4}}} or {{{2x = 5pi/4}}}


{{{x = pi/8}}} or {{{x = 5pi/8}}}


Note that we may add any integer multiple of {{{pi}}} to x, as 2x will be periodic with period {{{2pi}}}.