sinx<1/2
sinx=1/2
x₁=/6+2n, n ∈ Z
x₂=5/6+2n, n ∈ Z
x∈(5/6+2n, n ∈ Z; /6+2n, n ∈ Z).
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Answers & Comments
sinx<1/2
sinx=1/2
x₁=
/6+2
n, n ∈ Z
x₂=5
/6+2
n, n ∈ Z
x∈(5
/6+2
n, n ∈ Z; 
/6+2
n, n ∈ Z).