Question

Решите пожалуйста номера 146 и147

Answer 1

$147 a) \ \textless \ =\ \textgreater \ sin2x= \sqrt{3}/2; x=(-1)^k \pi /6+ \pi k/2; \\ b) \ \textless \ =\ \textgreater \ cos(x/2)=-1; x= \pi /2+ \pi k; \\ v) \ \textless \ =\ \textgreater \ sin4x=-1/2; x=(-1)^k(- \pi /24)+ \pi k/4;$