1.2.2 Greatest hits from previous weeks

1.2.2.1 Finding unit tangent, normal, and binormal vectors for a given r(t)

http://mathematica.stackexchange.com/questions/18598/finding-unit-tangent-normal-and-binormal-vectors-for-a-given-rt

 
For my Calc III class, I need to find $T(t), N(t)$, and $B(t)$ for $t=1, 
2$, and $-1$, given $r(t)=\{t,t^2,t^3\}$. 
 
I've got Mathematica, but I've never used it before and I'm not sure how 
to coerce  ...
 

- asked by a98 (12 votes), answered by Artes (29 votes)

1.2.2.2 Get a "step by step" evaluation in Mathematica

http://mathematica.stackexchange.com/questions/148/get-a-step-by-step-evaluation-in-mathematica

 
Is it possible in Mathematica to get a step-by-step evaluation of some 
functions; that's to say, outputting not only the result but all the 
stages that have led to it? 
 
Example : Let's say I want to  ...
 

- asked by Skydreamer (55 votes), answered by . . (47 votes)