Question

решить неравенство 

sin x< 1/2

Answer 1

(-п-arcsin(1/2)+2пn; arcsin(1/2)+2пn)

(-п- п/6+2пn; п/6+2пn)

(-7п/6+2пn; п/6+2пn)

Answer 2

1) п/6 +2пn<x<5п/6 2пn