Thread: Vector multiplication Very urgent: 15 mins

Hi. i really need help quick. Im doing a question where I have to find the tangent of a function.

I have 2 vectors r_u and r_v.



I just need to find the normal vector at the point (1,-1,2) which is given by but its been so long since ive done this i forgot how to multiply these two.

I have a matrix

i j k
1 0 2u
0 1 2v


after this i have no problem finding the tangent. Please help

Hello,

Have a look here : Cross product - Wikipedia, the free encyclopedia

The formula is given :



The cross product is the determinant of this matrix. Use Sarrus's rule Rule of Sarrus - Wikipedia, the free encyclopedia