Решите уравнение f (x) = 0 a) f (x) = 3 sin 2 x б) - вопрос №872337503242 от gggggguuu 02.02.2021 22:16

Question

Алгебра: Решите уравнение f (x) = 0 a) f (x) = 3 sin 2 x б) f (x) = 4 cos 2 x

gggggguuu · Answer

А)f (x)=(3sin2x) =3•cos2x*(2x) =6cos2xf (x)=06cos2x=02x=π/2+πk;x=π/4+πk/2b)f (x)=(4cos2x) =4•(-sin2x)•(2x) =-8sin2xf (x)=0-8sin2x=02x=πkx=πk/2;k€Z...

Решите уравнение f ' (x) = 0 a) f (x) = 3 sin 2 x б) f (x) = 4 cos 2 x