blogs fir cory yay

So i remembered to do a blog tonight.  All i remember doing is vectors lol so ill talk about that

How to add vectors: v + u = (a, b) + (c, d) = (a + c, b + d)

To subtract vectors: v - u = (a, b) – (c, d) = (a - c, b – d)

Scalar multiplication: kv = k * (a, b) = (ka, kb)

To find a vector equation from two points, you do P2 - P1

Vector equation: (x, y) = (x0, y0) + t (a, b)

Parametric equations: x = x0 + at and y = y0 + bt

To find the magnitude of a vector, you do |v| = sq. root of (x^2 + y^2)

Component form is (r cos theta, r sin theta)

example: Find the equation for the vector from points A(3,4) and B(5,6)

P2-p1
(5-3, 6-4)

(2,2)

(x,y)= (3,4) + t(2,2)

yay for blogs