Question: If we start with the definition = -(dB/ds) N and apply the Chain Rule to rewrite dB/ds as we arrive at the formula

If we start with the definition τ = -(dB/ds) · N and apply the Chain Rule to rewrite dB/ds asdB ds dB dt dt ds dB 1 dt V


we arrive at the formulaimage


Use the formula to find the torsion of the helix in Example 2.image


image


image

dB ds dB dt dt ds dB 1 dt V

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