How do you find the resultant magnitude of two vectors?

Answer 1

If the two vectors are in the form: P = ai + bj, and Q = ci + dj

Then the resultant vector is (a + c)i + (b + d)jand the magnitude is:

sqrt((a +c)2 + (b + d)2)

If 3 dimensional, then the k components are added then squared and added to the i & j components, before taking the square root.