Comment hidden because of low score. Click to expand.

is a comprehensive book on getting a job at a top tech company, while focuses on dev interviews and does this for PMs.

CareerCup's interview videos give you a real-life look at technical interviews. In these unscripted videos, watch how other candidates handle tough questions and how the interviewer thinks about their performance.

Most engineers make critical mistakes on their resumes -- we can fix your resume with our custom resume review service. And, we use fellow engineers as our resume reviewers, so you can be sure that we "get" what you're saying.

Our Mock Interviews will be conducted "in character" just like a real interview, and can focus on whatever topics you want. All our interviewers have worked for Microsoft, Google or Amazon, you know you'll get a true-to-life experience.

Dot product = Sum (xi*yi), i=0..n

- Eila June 11, 2006Cross product = matrix determinant (http://en.wikipedia.org/wiki/Cross_product)

from site: http://members.tripod.com/~Paul_Kirby/vector/Vplane.html

a plane formula is calculated by its normal:

Let a, b, c be the position vectors of 3 points in the plane. Then all we have to do to find the equation of the plane is construct a normal vector - then we can use this and any of the 3 points to find the equation as before.

The two vectors,

b - a (A to B)

c - a (A to C)

both lie in the plane, so if we take their cross product we find our normal vector:

n = (b - a) x (c - a) => cross product

the distance between the plane and the point is:

from :http://www-math.mit.edu/~djk/18_022/chapter02/example01.html

lets set p to be a point in the space, than:

((p-a),n)/(n,n)

Form the vector p - a and take its dot product with n divided by the magnitude of n.

The magnitude of the result will be the required distance.