Question

Need help with dot product

Answer 1

How do I find the angle between the two since there is not a k term?

Answer 2

Can I ignore it???

Answer 3

I know the formula to do it, its just that k term is throwing me off.

Answer 4

make it 0k

Answer 5

Ok. Thanks!

Answer 6

I got undefined @astrochyme ?

Answer 7

show me what you did?

Answer 8

-15 i -20 j +0 k
---------------
sqrt (0) * sqrt( 9+16+4)

Answer 9

----- means divided

Answer 10

the dot product is a scalar value

and the magnitude is sqrt(i^2+j^2+k^2) and is also a magnitude

Answer 11

scalar*

Answer 12

Can you help me step by step. I just don't understand.

Answer 13

the dot product would be Ax*Bx+Ay*By+Az*Bz

Answer 14

while ||A||=sqrt(Ax^2+Ay^2+Az^2)

and ||B|| follows the same logic