Question 1110426
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{{{log(2,(cos(x)))}}} = {{{-1/2}}}   <==== is equivalent to  ====>


cos(x) = {{{2^(-0.5)}}} = {{{1/sqrt(2)}}} = {{{sqrt(2)/2}}}   <=== ===>


x = {{{pi/4}}}.


<U>Answer</U>.   The least positive angle x such that  {{{log(2,(cos(x)))}}} = {{{-1/2}}}   is  x = {{{pi/4}}},  or  45 degrees.
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