## anonymous 5 years ago Find the vector v with the given magnitude and the same direction as you. Magnitude of v = 4, direction u = <1,1>

1. amistre64

<4,4>

2. amistre64

that aint it lol

3. anonymous

It must be a 1:1 ratio?

4. amistre64

<4cos(45), 4sin(45)>

5. anonymous

Is there a formula or is it a guess?

6. amistre64

that is the answer; to get normal looking numbersl just plug it into a calculator

7. amistre64

$<2\sqrt{2},2\sqrt(2)>$

8. amistre64

i know the direction is 45 degress (1,1) and the length of the thing is 4; so i used trig :)

9. anonymous

But what if magnitude is 2 and direction <sqrt(3),3>?

10. anonymous

compute the unit vector along u

11. anonymous

then multiply it by 2

12. amistre64

thats what...30 or 60 degress?

13. amistre64

<2cos(60), 2sin(60>)

14. anonymous

yeah ur right

15. anonymous

Excuse me, I need to go to class. Thank you.

16. anonymous

suppose C is a 3x3 matrix such that det(C )=2. then det(C+C) is equal to????? PLEASE, help!!