Differentiate y=4cosx−3sinxy = 4\cos x - 3\sin xy=4cosx−3sinx.
−4sinx−3cosx-4\sin x - 3\cos x−4sinx−3cosx
4sinx+3cosx4\sin x + 3\cos x4sinx+3cosx
−4sinx+3cosx-4\sin x + 3\cos x−4sinx+3cosx
4cosx−3sinx4\cos x - 3\sin x4cosx−3sinx