решить неравенство
sin x< 1/2
(-п-arcsin(1/2)+2пn; arcsin(1/2)+2пn)
(-п- п/6+2пn; п/6+2пn)
(-7п/6+2пn; п/6+2пn)
1) п/6 +2пn<x<5п/6 2пn
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(-п-arcsin(1/2)+2пn; arcsin(1/2)+2пn)
(-п- п/6+2пn; п/6+2пn)
(-7п/6+2пn; п/6+2пn)
1) п/6 +2пn<x<5п/6 2пn