4 Jul
2014
4 Jul
'14
3:58 p.m.
The easy way to calculate the tetrahedral bond angle β is to note that the bonds go from the origin to (1,1,1), (1,-1,-1), (-1,1,-1), and (-1,-1,1). Then cosβ = ((1,1,1).(1,-1,-1)) / (sqrt(3) sqrt(3)) = -1/3. -- Gene