Ctg(3n/2-2x)-корень 3=0 2cos2x=-1 15cos(n/2-5x)=0 2cos(2x-3)+1=0 cos(n/2-2x/3)=sin n/3

Ctg(3n/2-2x)-корень 3=0 ctg([latex] \frac{3n}{2} [/latex]-2x)= [latex] \sqrt{3} [/latex] [latex] \frac{3n}{2} [/latex]-2x=[latex] \frac{n}{6} [/latex] 2x=[latex] \frac{3n}{2} [/latex]-[latex] \frac{n}{6} [/latex]+ [latex] \pi n[/latex] 2x= -[latex] \frac{2 \pi }{3} [/latex]+[latex] \pi n[/latex] x= -[latex] \frac{ \pi }{3} [/latex] + [latex] \pi n[/latex]/2 2cos2x=-1 cos 2x= -1/2 2x= +-[latex] \frac{ \pi }{3} [/latex]+2[latex] \pi [/latex]n x=+-[latex] \frac{ \pi }{6} [/latex]+[latex] \pi [/latex]n 15cos(n/2-5x)=0 n/2-5x = [latex] \frac{ \pi }{2} [/latex]+ [latex] \pi [/latex]n 5x=[latex] \pi [/latex]+ 2[latex] \pi [/latex]n x=[latex] \pi [/latex]/5 + 2[latex] \pi [/latex]n/5