30.2 Cross Product

[@pchebbi]

Crisp, precise and crystal clear explanation. Great animation! Thank you!

[@borissimovic441]

Can someone please explain how can the length of a vector (cross product) which is a “1D line” be equal to the area which is 2D this is somehow confusing to me?

[@brenmclean]

Great video. Helpful definition of CP. PS. We have finally moved away from the blackboard! Well done ;-)

[@chestno-hw6eo]

Sir,why we use sin theta in vector product

[@aditya_saha]

to get the perpendicular height. area of //gm is twice the area of the triangle

[@chestno-hw6eo]

@@aditya_saha thankyou bro

[@ArchismanBhowalHere]

Can u tell me why cross product is the area of the parallelogram? What does the area signify?

[@truth30]

Great. Asinteta&bsinteta

[@EJ-lz6nc]

Thnanks a a lot, Pr

[@rvoros]

wow, he had to show right hand with left hand because video is flipped quite tricky maneuver when explaining right hand rule :)

[@s_s_m_hz]

perfect

[@daudkharal1328]

I don't get it. Is this intended for high school or college? I mean there's no intuitional and logical basis to the concept. Also, if it's a college course, what's the need when you have uploaded Walter Levin's lectures?

[@mohammedshalabi4191]

Hi sir. I just want to ask a question. Why is the height equals to b×sin(angle) not b×a. In another way why is the area of parallelogram doesn't equal to a×b

[@alfianmuhammad1335]

it came back to how we calculate the area of a parallelogram. The area is the horizontal component of it times the vertical component. B is the horizontal component, but A is not the vertical component. To find the vertical component, we use trigonometry thus sin came to existence.

[@John-wx3zn]

You taught WRONG! Their is no such thing as the left hand rule. If you do a cross b the orthogonal vector is always pointing up.