Question 1210238
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<pre>

{{{-5pi/8}}}  radians is the same angle as  {{{2pi - 5pi/8}}} = {{{16pi/8 - 5pi/8}}} = {{{11pi/8}}} radians.


So, the answer to the problem is  {{{11pi/8}}} radians.


This angle lies in the required diapason [{{{0}}},{{{2pi}}}).
</pre>

Solved.