Question

Решите уравнения: 
sin^2x+√3sin x cos x=0 
cos(х+3π/7)=-1

Answer 1

cos(х+3π/7)=-1

х+3π/7=t

cost=-1

t=π+2πk

х+3π/7=π

x=-3π/7+π

x=6π/7+2πk ,k=Z