How do I normalize a vector?

So how can I normalize a vector like this?

X = (target.x - player.x)

Y = (target.y - player.y)

You first find the length and divid both values by it.

(probably a dumb question)

is that the same as

Xnormalised = cos(angle(player.x,player.y,target.x,target.y))

Ynormalised = sin(angle(player.x,player.y,target.x,target.y))

?

(probably a dumb question)

is that the same as

Xnormalised = cos(angle(player.x,player.y,target.x,target.y))

Ynormalised = sin(angle(player.x,player.y,target.x,target.y))

?

I think yes, I used that formula to get what I wanted.

Thanks both.