Those don't work for me! I'm using Sympy 1.0 with Python 2.7.12.
[code]
>>> solveset(sin(x)-sqrt(2)/2, x, Interval(-2*pi, 2*pi))
⎧        3⋅π        ⎫   ⎧        π        ⎫
⎨2⋅n⋅π + ─── | n ∊ ℤ⎬ ∪ ⎨2⋅n⋅π + ─ | n ∊ ℤ⎬
⎩         4         ⎭   ⎩        4        ⎭

>>> solveset(sin(x)-sqrt(2)/2, x).intersect(Interval(-2*pi, 2*pi))
⎛              ⎧        3⋅π        ⎫⎞   ⎛              ⎧        π   
⎜[-2⋅π, 2⋅π] ∩ ⎨2⋅n⋅π + ─── | n ∊ ℤ⎬⎟ ∪ ⎜[-2⋅π, 2⋅π] ∩ ⎨2⋅n⋅π + ─ | 
⎝              ⎩         4         ⎭⎠   ⎝              ⎩        4   

     ⎫⎞
n ∊ ℤ⎬⎟
     ⎭⎠
[/code]

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