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location Israel
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visits member for 3 years, 3 months
seen Feb 2 '13 at 0:20

Sep
2
comment Creating a special vector from two vectors
Thats working great, thanks.
Sep
2
comment Creating a special vector from two vectors
@J. M. added an image.
Sep
2
comment Creating a special vector from two vectors
@J. M. its not perpendicular to them. the vector that connects the two endpoints $\vec {BD}$ is perpendicular to $\vec {AB}$ and same for the other vector.
Aug
31
comment Calculating the area of a special hexagon
@Glen Wheeler: you are right, I forgot a constraint, see the edit.
Aug
31
comment Calculating the area of a special hexagon
@Mark Bennet: you are right, I forgot a constraint, see the edit.
Jun
13
comment dot product negative angle
yes, I've been able it to that. didn't know cross product is such an easy operation.
Jun
13
comment dot product negative angle
Isn't there an easier way?
Apr
14
comment Finding the first term of a geometric series by the sum and $n$
actually by the link Raskolnikov gave its $S = a \cdot \frac{r^{n+1}-1}{r-1}$ because my series terminates in $n$ not $n-1$