Question

||u||=10 and ||v||=10, and the angle between u and v is ((5pi)/(6)). what is u•v?

Answer 1

u•v = ||u|| ||v|| cos(A)
where A is the angle between the 2 vectors

Answer 2

would that just be 10•10•cos(A)?

Answer 3

the "thick dot" means dot product of two vectors.
but if you mean multiply then yes, except A is given (in radians) as 5 pi/6

Answer 4

type
10*10*cos(5*pi/6)=
in the google search window to get a number

Answer 5

-86.6025403784?

Answer 6

yes

Answer 7

thanks so much!