Get the width and height of rotated object after transform

Question

This question is a followup to the question: width/height after transform.

I am posting a new question because that question only solves the width and not the height. The formula:

var x = $('#box').width()*Math.cos(rotationAngle) 
      + $('#box').height()*Math.sin(rotationAngle);

works well for the width, what is the equivalent formula to calculate the height?

Thanks.

Answer 1

This is the best working formula I have come up with:

var h = $(obj).height() * Math.abs(Math.cos(deg)) + $(obj).width() * Math.abs(Math.sin(deg));
var w = $(obj).width() * Math.abs(Math.cos(deg)) + $(obj).height() * Math.abs(Math.sin(deg));