Calculus 3: Vector Calculus in 2D (23 of 39) What is the Unit Tangent Vector?

Visit http://ilectureonline.com for more math and science lectures! In this video I will explain and find the unit tangent vector T(t=2)=? of position vector r(t)=(t^2)i+3tj. Next video in the series can be seen at:    • Calculus 3: Vector Calculus in 2D (24 of 3...