I'm stuck on this. Any help you can give would be great!

If http://webwork2.math.utah.edu/webwor...52a3bc6961.png is given by: http://webwork2.math.utah.edu/webwor...2547fadae1.png and http://webwork2.math.utah.edu/webwor...29866a5ec1.png is given by: http://webwork2.math.utah.edu/webwor...3ea8005af1.png

Find the total length of the astroid described by http://webwork2.math.utah.edu/webwor...52a3bc6961.png and http://webwork2.math.utah.edu/webwor...29866a5ec1.png.

(The astroid is the curve swept out by http://webwork2.math.utah.edu/webwor...d5f4d7fdf1.png as http://webwork2.math.utah.edu/webwor...631e7925d1.png ranges from http://webwork2.math.utah.edu/webwor...f2f64ba2d1.png to http://webwork2.math.utah.edu/webwor...ad24a5d741.png )