Ответ:
cosx=1/2
x=+-arccos(1/2)+2pi*n
x=+-pi/3+2pi*n n∈Z
x=+-60+360*n n∈Z
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Ответ:
cosx=1/2
x=+-arccos(1/2)+2pi*n
x=+-pi/3+2pi*n n∈Z
x=+-60+360*n n∈Z