tan(x) = sin(x) / cos(x)
F(x) = cos(x+3)
sin(x+3) = sqrt(1 - cos^2(x+3))cos(x+3) = cos(x)cos(3) - sin(x)sin(3)
F'(x) = sin(x+3)
tan(x+3) = sin(x+3) / cos(x+3)tan(x+3) = sin(x+3) / (cos(x)cos(3) - sin(x)sin(3))tan(x+3) = sin(x+3) / F(x)
tan(x) = sin(x) / cos(x)
F(x) = cos(x+3)
sin(x+3) = sqrt(1 - cos^2(x+3))
cos(x+3) = cos(x)cos(3) - sin(x)sin(3)
F'(x) = sin(x+3)
tan(x+3) = sin(x+3) / cos(x+3)
tan(x+3) = sin(x+3) / (cos(x)cos(3) - sin(x)sin(3))
tan(x+3) = sin(x+3) / F(x)