[TheForge] Math

[A. Vida]

Michael Wolfe wrote:
> 
> I need to figure the amount of lean in inches, I would
> get on a 12 foot post that is leaning 3 degrees.
> Or if you know the formula for one degree I could
> figure the actual lean when I go on site and it really
> is 4.5 degrees...

	Sin(theta) = y/r

We know the angle theta (3*) and the radius vector (12).

Sin(3) == .05234 - give or take

You wish to find the value of y.  Isolating y, multiply both sides of
the
equation by r.  r divides out on the right side.

	r * sin(theta) = y

	12 * .05234    = y
  	
		.628   = y - or about 5/8"
		

Or so the numbers tell me.