ПОМОГИТЕ!
1) sin(x-\frac{pi}{6} )=\frac{\sqrt2}{2}
2) sin(\frac{pi}{8} -x)=\frac{\sqrt3}{2}
3)2cos(\frac{x}{2} +3)+1=0
4)2×cos(\frac{x}{2} +3x)=1
5)cos(\frac{pi}{9} -4x)=1
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