Find the unit vectors that are parallel to the tangent line to the curve 
at the point 
Definitions:
Primary Sector
The sector of an economy involving the extraction and harvesting of natural resources directly from the earth, such as agriculture, mining, and forestry.
Tertiary Sector
This term refers to the sector of an economy focused on services rather than the production of goods, including areas such as retail, entertainment, and financial services.
Secondary Sector
The part of the economy that includes industries involved in the processing, transformation, fabrication, or construction of materials and products from raw materials.
Rational-Legal
An authority system based on legal rules and regulations, and the rationality of law, often associated with modern bureaucracies.
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