Объяснение:
cos3x<√3/2
0:
cos3x=√3/2
3x=±π/6+2πk
x=±π/18+2πk/3
π/18+2πk/3<x<35π/18+2πk/3
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Объяснение:
cos3x<√3/2
0:
cos3x=√3/2
3x=±π/6+2πk
x=±π/18+2πk/3
π/18+2πk/3<x<35π/18+2πk/3