1. The problem statement, all variables and given/known data Find the derivative of m(x)=-e^x*cosx at x=1 graphically and algebraically. 2. Relevant equations 3. The attempt at a solution So first i just attempted to find the derivative: m'(x)=-xe^(x-1)*(-sinx)----> is this correct? so to find at x=1 i just sub in 1. m'(1)=-(1)e^(1-1)*(-sin1) m'(1)=-1e^0*(-sin1) m'(1)=0.01745 Is this correct? When i tried graphing the derivative i got a different answer so it made me second guess my original answer. Any help is very much appreciated, thank you.