Ответ:
3(Cos4xCos2x -Sin4xSin2x) = -3
Cos4xCos2x -Sin4xSin2x = -1
Cos6x = -1
6x = п+2+k, k EZ
x = -1/6 ++k/3, k EZ
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Ответ:
3(Cos4xCos2x -Sin4xSin2x) = -3
Cos4xCos2x -Sin4xSin2x = -1
Cos6x = -1
6x = п+2+k, k EZ
x = -1/6 ++k/3, k EZ