у' = sin(3x-9)' = sinu' × (3x-9)' = cosu × 3 = 3cos(3x-9)
y' = cos(π/3-4x)' = cosu' × (π/3-4x)' = -sinu × (-4) = -4sin(4x-π/3) = 4cos(4x+π/6)
у' = sin(3x-9)' = sinu' × (3x-9)' = cosu × 3 = 3cos(3x-9)
y' = cos(π/3-4x)' = cosu' × (π/3-4x)' = -sinu × (-4) = -4sin(4x-π/3) = 4cos(4x+π/6)