(a) Let u and v be two vectors in R³ such that ||u|| = 4 and ||v|| possible values of u v and ||u – v||. = 7, find the largest and smallest (b) Let v = (2, -3,4), u = (4, 2, −3) € R³, find all real value(s) of c such that (v-cu) will be orthogonal to u.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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(a) Let u and v be two vectors in R³ such that ||u|| = 4 and ||v||
possible values of u · v and ||u – v||.
(b) Let v = (2, -3,4), u = = (4, 2, −3) € R³, find all real value(s) of c such that (v-cu) will be orthogonal
to u.
= 7, find the largest and smallest
Transcribed Image Text:(a) Let u and v be two vectors in R³ such that ||u|| = 4 and ||v|| possible values of u · v and ||u – v||. (b) Let v = (2, -3,4), u = = (4, 2, −3) € R³, find all real value(s) of c such that (v-cu) will be orthogonal to u. = 7, find the largest and smallest
Expert Solution
Step 1: Description of the problem

a) use the fact that

u.v=||u||.||v||cos(theta)

and

||u-v||^2=||u||^2+||v||^2-2||u||.||v||cos(theta)

where theta is the angle between two vectors u and v.

b) vectors u and v are orthogonal if and only if u.v=0

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