Evaluate lim [ (e^-x) * cos (x) ] as x approaches negative infinity.

So to evaluate the limit of lim[ (e^-x) * cos (x) ] as x approaches negative infinity the possible answer to this question and based on my calculation and some research according to it i came up with an answer of limy to the infinity of E to the power of Y times the cos (y) equals the lim of x to the infinity time value of E to the power of x times cos (x)