Question

FIND THE ANGLE BETWEEN A and B if A=i-j+k and b=2i-2j + 4k

Answer 1

Answer:

here ur answer

Explanation:

(1)

2

+(1)

2

+(1)

2

(2)

2

+(−2)

2

+(2)

2

(

i

^

+

j

^

+

k

^

)⋅(2

i

^

−2

j

^

+2

k

^

)

=

3

12

2−2+2

=

6

2

=

3

1

⇒θ=cos

−1

(

3

1

)