In setting up the vectors for an inclined plane problem, it is

**"more helpful to express the components of W in terms of the angle theta, which the inclined surface makes with the horizontal. In terms of theta, the components of W are:**

Wx = W sin theta = mg sin theta (W = mg)

Wy = W cos theta = mg cos theta"

Wx = W sin theta = mg sin theta (W = mg)

Wy = W cos theta = mg cos theta"

I really can't visually or even conceptually understand why the x now corresponds to sin, and y now corresponds to cos.

Any help would be great, thanks!

*(Reference: Page 205 of Physics review notes, Kaplan.)*