(701, #15) Find the angle between the vectors a = 6i - 2j - 3k and b = i + j +k . (First find an exact expression and then approximate to the nearest degree.)
Solution:
First of all,
= <6,-2,-3 >
< 1,1,1 > = 1
Secondly,
= 7,
=
by: gm
= <6,-2,-3 >
< 1,1,1 > = 1
= 7,
=
