Question

8. Consider the vector v = <3, 2>.
a. What is the angle between v = <3, 2> and the positive x-axis?




b. Write v in the form (|v|cosθ|v|sinθ).

Answer 1

dot product may help

Answer 2

\[\cos\alpha=\frac{\vec u\cdot \vec v}{|\vec u|~|\vec v|}\]

Answer 3

can you explain it? i will be back have to eat lunch

Answer 4

let u = <1,0> for simplicities sake: |u| = 1, and u.v = xpart of v

Answer 5

i play in real time .... so when you get back we will discuss it if im available

Answer 6

@amistre64