Answer to Question #173328 in Calculus for Jothisha

Question #173328

if A = cos(xy)i + ( 3xy + 2x ^2 )j - (3x + 2y )k find d^2A/dy^2 and d^2A/dxdy

Expert's answer

"\\frac{dA}{dy}=-xsin(xy)i+3xj-2k"

"\\frac{d^2A}{dy^2}=-x^2cos(xy)i"

"\\frac{d^2A}{dxdy}=(-sin(xy)-xycos(xy))i+3j"

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