Asked by Elyse

Find all first partial derivatives:

f(x,y)=e^(xy)cosx
Answered by Steve
Fx = ye^(xy)cosx - e^(xy)sinx
= e^(xy) (ycosx - sinx)

Fy = xe^(xy) cosx
Answered by Andy
Find, f1(0,180°) if (x,y)= e^(xy)cos(x+y).
Answered by Andy
Find, f1(0,180°) if f(x,y)=e^(xy)cos(x+y)
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