$\"\"$

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The radius is $\"\"$ .

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$\"\"$ .

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The number of turns $\"\"$ .

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Find the length of the helix.

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The value of $\"\"$ .

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$\"\"$

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$\"\"$ .

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The length of the each helix is $\"\"$ .

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Consider the curve is $\"\"$ .

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$\"\"$

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$\"\"$

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Substitute $\"\"$ , $\"\"$ and $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

\

$\"\"$

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$\"\"$

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$\"\"$

\

$\"\"$

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Substitute $\"\"$ , $\"\"$ and $\"\"$ .

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$\"\"$

\

$\"\"$

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Since $\"\"$ .

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$\"\"$ .

\

Therefore, the length of the helix is $\"\"$ .

\

$\"\"$

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The length of the helix is $\"\"$ .