a)
cos(2x-30)=sin4x
cos(2x-30)=cos(90-4x)
2x-30=90-4x
6x=120
x=20 Градусов
b)sin5
cos(5x-45)=cosx
5x-45=x
4x=45
x=45/4=11.25
a)
cos(2x-30)=sin4x
cos(2x-30)=cos(90-4x)
2x-30=90-4x
6x=120
x=20 Градусов
b)sin5
cos(5x-45)=cosx
5x-45=x
4x=45
x=45/4=11.25