Question

Rotate the vector by the angle given

Answer 1

@freckles

Answer 2

<3,7> by 180 degrees

Answer 3

@freckles @rational @amistre64

Answer 4

180 degrees?

Answer 5

yes

Answer 6

Well, my crappy sketch is hinting something.

Answer 7

https://www.khanacademy.org/math/linear-algebra/alternate_bases/change_of_basis/v/lin-alg-changing-coordinate-systems-to-help-find-a-transformation-matrix

Answer 8

Looks like new vector is facing opposite direction.

Answer 9

that doesn't help @adamaero

Answer 10

What about me? Do you agree that new vector is same except facing opposite direction?

Answer 11

In that case, new vector is \(\langle -3,-7\rangle \)

Answer 12

oh, wow... that's it?

Answer 13

yes, that's it