രണ്ടാമതായി, ഏറ്റവും പ്രധാനപ്പെട്ടത് , ഇതിന്റെ ഡെറിവേറ്റീവ് ലഭിക്കുന്നത്, ഈ എന്ന് നൽകിയ കർവ്ലേക്കുള്ള ടാൻജന്റ് വെക്റ്റർ ആണ്ഇത്.
మరియు రెండవది, యొక్క అతి ముఖ్యమైనది, దీని యొక్క ఉత్పన్నం పొందడం, ఇది ఈ ఇచ్చిన కర్వ్ కి టాంజెంట్ వెక్టర్.