What is the unit vector that is orthogonal to the plane containing <3, -6, 2> and <3, 2, 1> ?

1 Answer
Feb 21, 2016

(-10/sqrt 685*i+3/sqrt 685*j+24/sqrt 685.k)

Explanation:

"step 1:Find cross product of two vector"
"the cross product of two vector in the same plane is perpendicular to the plane"
"let "vec C=vec A X vec B
vec C=i(a_y*b_z-a_z*b_y)-j(a_x*b_z-a_z*b_x)+k(a_x*b_y-a_y*b_x)
vec c=i(-10)-j(-3)+k(24)
vec C=-10i+3j+24k
"step 2:Find magnitude of the vector of " vec C
||c||=sqrt((-10)^2+3^2+24^2)
||c||=sqrt (100+9+576)
||c||=sqrt 685
step 3:" use : vec C /||c||
(-10i+3j+24k)/sqrt 685
(-10/sqrt 685*i+3/sqrt 685*j+24/sqrt 685.k)