what you want here is the cross-product for the 2 vectors [4,2,-3] and [2,-3,1]
an algebraic approach is to let that vector be [a,b,c],
then [a,b,c]∙[4,2,-3] = 0
and [a,b,c]∙[2,-3,1] = 0
from the first: 4a+2b-3c=0
from second: 2a-3b+c=0
double the second and subtract it from the first:
b/c = 5/8
let b=5 and c=8 back in first
4a + 10 -24 = 0
so a possible vector is [7/2,5,8] or
You can check that the dot product with each of the original vectors is zero, it works.
but you wanted a unit vector.
The magnitude of [7,10,16] is √(7^2+10^2+16^2) = √405
so the unit vector which is perpendicular to both is [7/√405,10/√405,16/√405]
there is a nice algorithm to find the cross product between two vectors [a,b,c] and [d,e,f]
line up the numbers above each other
a b c
d e f
the cross product is
I follow this method,
block out the first column with my finger, then take the difference in the products of the diagonals of the remaining 2by2
block out the middle column with my finger , then take the -(difference in the products of the diagonals of the remaining 2by2)
block out the last column with my finger, then take the difference in the products of the diagonals of the remaining 2by2
cross product is
=[-7,-10,-16] which is a multiple of [7,10,16 from above.
IB Math SL - The triangle ABC is defined by the following information. Vector OA...
Math IB SL - 2^2x . 5^(x-3)=10^(x+2)
Math - vectors - In the product F(vector)=q(V(vector)xB(vector), take q = 4, V(...
Math IB SL - Factorize: 2x^2-xy-6y^2 ????
math - Calculate the magnitude of a when a = (2, 3, -2). Find (1/|a|)xa. Is it a...
calculus - Find a unit vector U such that the rate of change of f in the ...
Math - Find the unit vector that points in the same direction as the vector from...
Mathematical Methods IB, SL - e^(ln2x)=e^2 (?) thanks in advance
maths - The position vector of the point A(3,4) relative to an origin O is a. (a...
Calculus - a square is defined by the unit vectors i(vector) and j(vector). FInd...