Q8 and Q9 plz help fast

Q8. If  e 1   , e 2  and  e 1   - e 2 are unit vectors, then angle between  e 1   and   e 2  is _________

       (A)  π 3                          (B)  π 6                      (C)  π 4                        (D)  π 2

Q9. The disjunction pv  ~ q is false only when ___________

      (A) both p and q are false                                        (B) p is true and q is false

      (C) p is false and q is true                                        (D) both p and q are true



 
 

Dear student
Given: e1=e2=e1-e2=1Consider,e1-e2=e12+e22-2e1e2cosθ1=1+1-211cosθ12=2-2cosθ2cosθ=1cosθ=12cosθ=cosπ3θ=π3
For remaining queries we request you to post them in separate threads to have rapid assistance from our experts.

Regards

  • 0
What are you looking for?