Answer:
Given:
a
=2
i
^
+
j
−3
k
and
b
=3
−2
−
.
=(2
)(3
)
=6−2+3=7....(1)
∣
∣=
2
+1
+(−3)
=
14
....(2)
3
+(−2)
+(−1)
....(3)
cosθ=
∣.
7
1
cosθ=cos60
o
θ=60
Hence the required angle is 60
7.2m questions
9.6m answers