What conclusion can you draw about vectors 
and 
when 
and 
It is given that:
⇒
Since sinθ and cosθ cannot be 0 simultaneously ∴
| = 0
Conclusion: when 
Then 
| = 0
1
What conclusion can you draw about vectors and when and
It is given that:
⇒
Since sinθ and cosθ cannot be 0 simultaneously ∴| = 0
Conclusion: when
Then | = 0