Calculus and Vectors:
(Step by Step please - I really don't understand this one)

Let u = 4i-2j+ 3k and v = [−1, 0, 3]. Determine the following.
a. 3u - 2v
b. | v|
c. directional angles of v
d. unit vector of v .

Question

Calculus and Vectors:
(Step by Step please - I really don't understand this one)

Let u  = 4i-2j+ 3k and v  = [−1, 0, 3]. Determine the following. 
a.	3u - 2v  
b.	| v|
c.	directional angles of v 
d.	unit vector of v .

anonymous · Answer

u =<4,-2,3> and v=<-1,0,3> so 3u =<12,-6,9> and 2v= <-2,0,6> hence 3u-2v = 10,-6,3>

anonymous · Answer

|v|=sqrt( 1+0+9)=sqrt(10)

anonymous · Answer

direction angles of v   are cos^-1(-1/sqrt(10))  , 90 degree, cos^-1(-3/sqrt(10))

plz neglect any typo error

anonymous · Answer

unit vector of v = <-1/sqrt(10),0,3/sqrt(10)>

anonymous · Answer

wouldn't the answer be (14,-6,3) for the first one?

dumbcow · Answer

yes its (14,-6,3) , they just had a typo

anonymous · Answer

alright, than kyou