What are the solutions to the equation cosine of the quantity x plus 3 times pi over 2 end quantity equals radical 2 over 2 on the interval [0, 2π]?

open bracket pi over 4 comma 3 times pi over 4 close bracket
open bracket 5 times pi over 4 comma 7 times pi over 4 close bracket
open bracket negative pi over 4 comma 3 times pi over 4 close bracket
open bracket 3 times pi over 4 comma 5 times pi over 4 close bracket

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