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May
24
comment Subtract gravity from 3D object in different orientations
@Steven: You're quite welcome. :)
May
24
revised Subtract gravity from 3D object in different orientations
Revised.
May
24
comment Subtract gravity from 3D object in different orientations
@Steven: Yes, there is that important caveat. Well, if you know how to do matrix multiplication, then you can derive the matrix yourself by multiplying the three simpler rotation matrices in the proper order.
May
24
revised Subtract gravity from 3D object in different orientations
Updated in light of real-world observations.
May
24
comment Subtract gravity from 3D object in different orientations
@Steven: Huh, interesting. I didn't do any testing myself, I just found this matrix and did the relevant multiplication...so I suppose it's possible they had a typo or something.
May
24
comment Probability that 5 different faces come up twice each if 6 side die is rolled ten times?
@meiryo: en.wikipedia.org/wiki/…
May
24
revised Trying to plot these points in a polar coordinate system
LaTeX formatting.
May
24
suggested approved edit on Trying to plot these points in a polar coordinate system
May
23
answered Prove that 2 students live exactly five houses apart if
May
23
revised Anti-prime sequence
LaTeX formatting
May
23
suggested approved edit on Anti-prime sequence
May
23
revised Boundary conditions of an elastic bar
LaTeX formatting.
May
23
suggested approved edit on Boundary conditions of an elastic bar
May
23
answered Subtract gravity from 3D object in different orientations
May
23
comment Number of ways of spelling Abracadabra in this grid
I think your problem is that you're treating picking the "A" as one of two choices, when there's really nothing you can do about it. Two routes to a B and two from each B to an R gives $2*2 = 4$ ways.
May
22
revised imaginary numbers - how can I understand them - especially as they occur in 'roots' of polynomials?
LaTeX formatting.
May
22
suggested approved edit on imaginary numbers - how can I understand them - especially as they occur in 'roots' of polynomials?
May
22
revised Did I sketch this polar curve correctly?
LaTeX formatting.
May
22
suggested approved edit on Did I sketch this polar curve correctly?
May
22
revised How do I explain why $dA/dr = 2 \pi r$ geometrically?
LaTeX formatting.