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

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

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