Skip to main content\(\newcommand{\R}{\mathbb{R}}
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A three dimensional plot of a helical path of radius one and change of height of 3 with the a blue and red arrow starting at the different points on the curve and pointing in a direction that is tangent to the curve at that point. At the point on the curve with the red arrow there is a green arrow perpendicular to the red arrow that points to the inside of the curve. At the point on the curve with the blue arrow, there is a yellow arrow pointing to the inside of the curve. The red and blue arrows are labeled
\(\vT\) and the green and yellow arrows are labeled
\(\vN\text{.}\)