Question

HELP!!!!Determine whether the vectors u and v are parallel, orthogonal, or neither.

u = <10, 0>, v = <0, -9>

Answer 1

i think i graphing wrong or something but i think it is Orthogonal

Answer 2

@UnkleRhaukus @thomaster @terenzreignz

Answer 3

There's an easy test to check whether they are orthogonal...the dot product

Answer 4

Do you know how to get the dot product?

Answer 5

no i do not

Answer 6

wait i do know

Answer 7

You do? Great :)
What's their dot product?

Answer 8

is it like (10)(0) and (0)(-9)

Answer 9

You add those...
\[\Large <a,b> \cdot <p,q> = ap+ bq\]

Answer 10

And you get...?

Answer 11

0

Answer 12

so is it neither

Answer 13

That's right :)
And when the dot product of two vectors is zero, then they are orthogonal ^_^

Answer 14

It's not neither... delete that comment lol

Answer 15

oh okay thnx

Answer 16

can you help me with one more question

Answer 17

We'll see :)

Answer 18

Find all polar coordinates of point P where P = ordered pair 3 comma negative pi divided by 4.

Answer 19

@terenzreignz