Question

помогите пж$cos frac{ pi x}{6} = frac{ sqrt{3} }{2}$

Answer 1

$cos frac {pi x}{6} = frac{ sqrt{3} }{2} \ frac {pi x}{6}=+- frac{ pi }{6} +2 pi n \ pi x=+- pi +12 pi n \ x=+-1+12n$
отв: +-1+12n, n∈Z