Re: HP35S and angle between two segments in the space Message #3 Posted by Chuck on 24 Apr 2008, 4:51 p.m., in response to message #1 by Antonio Maschio (Italy)
There are a number of ways, but here is one that uses the equation feature and the dot product.
Store points X1, X2, and X3, into A, B, and C.
In EQN , create:
ACOS((AB)*(CB)/(ABS(AB)*ABS(CB)))
and evaluate the EQN.
[EDIT] Be careful with the order the points are entered. My equation makes two vectors B to A, and B to C, or the angle ABC.
CHUCK
Edited: 24 Apr 2008, 5:43 p.m. after one or more responses were posted
