# Vector components on Tilted Axis

1. Jan 10, 2012

### LearninDaMath

θ1. The problem statement, all variables and given/known data

Find the components N$_{x}$ and N$_{y}$ of vector N in the tilted cooridinate system.

2. Relevant equations

cosθ = adg/hyp and sinθ= opp/hyp

3. The attempt at a solution

The correct answer is supposed to be
N$_{x}$ = -Nsinθ and N$_{y}$ = Ncosθ

The error is on the component vector N$_{x}$.

How do you find the component vectors and come up with a negative for N$_{x}$?

Last edited: Jan 10, 2012
2. Jan 10, 2012

### Simon Bridge

The x component of N is pointing in the -x direction.
That's what the minus sign is telling you.

You have to do this because the positive angle is measured from the y axis and towards the negative x axis.
If you measured it towards the positive x axis then the angle shown would be negative, and the sign would take care of itself.