A) Find the unit vector parallel to tan(x) at (Pi/4, 1)(adsbygoogle = window.adsbygoogle || []).push({});

B) Find the unit vector normal to tan(x) at (Pi/4, 1)

dy/dx tanx = sec^{2}x and sec^{2}x evaluated at x = Pi/4 is 2. So the slope of the parallel line is 2, but how do I then derive the unit vector?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Find the Unit Vector

**Physics Forums | Science Articles, Homework Help, Discussion**