Evaluate ddx(cos2(x)+sin2(x))\frac{d}{dx} (\cos^2(x) + \sin^2(x))dxd(cos2(x)+sin2(x)).
2sin(x)cos(x)2\sin(x)\cos(x)2sin(x)cos(x)
111
000
−2sin(x)cos(x)-2\sin(x)\cos(x)−2sin(x)cos(x)