Q12 of 44 Page 1057

Prove that , where θ is the angle between and .

We know that |


And |


So,



Hence, proved.


More from this chapter

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10

If , and , find a vector which is perpendicular to both and and for which .

 11

If , and , find a vector which is perpendicular to both and and for which .

 13

Write the value of p for which and are parallel vectors.

 14 A

Verify that , when

, and