Medium
Evaluate ddx(cos(ex))\frac{d}{d x}(\cos (e^{x}))dxd(cos(ex))
−exsin(ex){-e^{x} \sin (e^{x})}−exsin(ex)
sin(ex) \sin (e^{x})sin(ex)
cos(ex) \cos (e^{x})cos(ex)
4xcos(ex−1)4x \cos (e^{x-1})4xcos(ex−1)
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