Question

given two vectors u and v such that u.v=|u|.|v|. explain what you know about the two vectors? its a vector question under cross product and dot product. thanks

Answer 1

in general\[\vec u\cdot\vec v=\|\vec u\|\|\vec v\|\cos\theta\]

Answer 2

now the fact that in this case\[\vec u\cdot\vec v=\|\vec u\|\|\vec v\|\]what does this imply about the value of \(\cos\theta\) in this case?

Answer 3

means titt is 0. because cos tita is 1.

Answer 4

right, so what does that tell us about the two vectors given that the angle between them is zero?

Answer 5

perpendicular?

Answer 6

what is the definition of two perpendicular lines?

Answer 7

ummm honestly i do not know?

Answer 8

that they meet at 90 degrees

Answer 9

and what did wee say the angle between these two vectors was?

Answer 10

the angle between the two vectos is 0.

Answer 11

so they aint perpendicular then, right?
so try to think what it means for them to meet at 0 degrees

Answer 12

vector with its self magnitude squared.