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I can get the tangent line by using "Tangent" Then what about the normal plane
Tangent(t->{t, t^2, t^3}, t = 2)
See attached. I am not sure but I think eq #4 is the same as the HESSIAN operator. Why can I not get MAPLE to express this in the form of a matrix with the NABLA command? Note the discrepancy of NABLA with theDELoperator as well shown by eq's 5 & 6.
Am I missing some command to get NABLA to carry out the correct operation or am I not interpreting what NABLA actually is?
regards
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The directional derivative of a scalar function , computed in the direction u in Cartesian coordinates, is defined by
