How can we help?

kaibarreraera

kaibarreraera commented, January 10, 2021 02:19
I think I understand now. Perhaps in the previous video he was strictly adding each determinant meaning the j component would have to be (4)(1) - (2)(1) = +2 to correct for the sign. However if we ...
kaibarreraera created a post, January 09, 2021 11:18
Possible Error in "distance between planes " video on linear algebra.
Answered

At 6:27 sal is calculating a cross product of two vectors in 3d space. He calculates i as (a2×b3)-(a3×b2) which is fine. What I'm confused about is why he calculates j as (a1×b3)-(a3×b1) instead of...
1. Community
2. Study Group