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27.5.3  Tangent planes in space

See Section 26.6.7 for tangents in the plane.

The tangent command finds tangent planes to surfaces.

Examples

S:=sphere([0,0,0],3); tangent(S,[2,2,1])
G:=plotfunc(x^2+y^2,[x,y]); tangent(G,[2,2])

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