Revision history [back]
 | 1 | initial version |
Well...
sage: R=vector([3*cos(t),3*sin(t),4*t]);R
(3*cos(t), 3*sin(t), 4*t)
sage: with assuming(t,"real"): (R.diff(t).norm()^2).trig_reduce().sqrt()
5
Is that acceptable to you ?
| | 2 | No.2 Revision |
Well...
sage: R=vector([3*cos(t),3*sin(t),4*t]);R
(3*cos(t), 3*sin(t), 4*t)
sage: with assuming(t,"real"): (R.diff(t).norm()^2).trig_reduce().sqrt()
5
or even :
sage: with assuming(t,"real"): R.diff(t).norm().trig_reduce()
5
Is that acceptable to you ?
