Find y′y'y′ for y=sinx+cosx+tanxy = \sin x + \cos x + \tan xy=sinx+cosx+tanx.
cosx−sinx+sec2x\cos x - \sin x + \sec^2 xcosx−sinx+sec2x
−sinx+cosx+sec2x-\sin x + \cos x + \sec^2 x−sinx+cosx+sec2x
cosx+sinx+sec2x\cos x + \sin x + \sec^2 xcosx+sinx+sec2x
cosx−sinx+cot2x\cos x - \sin x + \cot^2 xcosx−sinx+cot2x