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sin(3x/2 + pi/12)<корень из 2 /2

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$sin( \frac{3x}{2} + \frac{ \pi }{12})\ \textless \ \frac{ \sqrt{2} }{2} \\ \frac{3 \pi }{4} +2 \pi n\ \textless \ \frac{3x}{2} + \frac{ \pi }{12}\ \textless \ \frac{ \pi }{4} +2 \pi n \\ \frac{8 \pi }{12} +2 \pi n\ \textless \ \frac{3x}{2} \ \textless \ \frac{2 \pi }{12} +2 \pi n \\ \frac{16 \pi }{12} +4 \pi n\ \textless \ 3x\ \textless \ \frac{4 \pi }{12} +4 \pi n \\ \frac{4 \pi }{9} + \frac{4 \pi n}{3} \ \textless \ x\ \textless \ \frac{ \pi }{9} + \frac{4 \pi n}{3}\\$
x∈ $( \frac{4 \pi }{9} + \frac{4 \pi n}{3} ; \frac{ \pi }{9} + \frac{4 \pi n}{3} )$ , n∈Z

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