Решить тригонометрические уравнения:
а)[tex]2cos x (\frac{x}{3} + \frac{ \pi }{4} ) - \sqrt{3} = 0[/tex]
б)[tex]tg ( -\frac{1}{7} x) = -1 [/tex]

2cos(x/3+π/4)-√3=0cos(x/3+π/4)=√3/2x/3+π/4=-π/6+2πk U x/3+π/4=π/6+2πkx/3=-5π/12+2πk U x/3=-π/12+2πkx=-5π/4+6πk U x=-π/4+6πk,k∈ztg(-x/7)=-1-tgx/7=-1tgx/7=1x/7=π/4+πkx=7π/4+7πk,k∈z