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Calculus

Visual explanations and practice for tangent planes and linear approximation.

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See the ideas behind the formulas.

2 articles

See how the errors from two coordinate steps add up to the total tangent-plane approximation error.

Explore the geometry of the Δx and Δy contributions—and what happens when they cancel.

Put your understanding to the test.

1 question

Choose between two formulas and check your reasoning.