- #1
yosheey
- 2
- 0
If there are three nonzero vectors..
Do you think cosine effects this example:show the three vectors must lie in the same plane?
-------------
* -->dot product
X -->cross product
--------------
A*(BXC)=0
so we can change as..
|A||B||C|sin[tex]\alpha[/tex]cos[tex]\beta[/tex]=0
then... we can meet
sin[tex]\alpha[/tex]cos[tex]\beta[/tex]=0
so ...
Exactly sin can make vectors lie in same plane if sin=0 (because three of two vectors have same direction...)
but I'm not sure cos effects...?
Do you think cosine effects this example:show the three vectors must lie in the same plane?
-------------
* -->dot product
X -->cross product
--------------
A*(BXC)=0
so we can change as..
|A||B||C|sin[tex]\alpha[/tex]cos[tex]\beta[/tex]=0
then... we can meet
sin[tex]\alpha[/tex]cos[tex]\beta[/tex]=0
so ...
Exactly sin can make vectors lie in same plane if sin=0 (because three of two vectors have same direction...)
but I'm not sure cos effects...?