[image]http://img364.imageshack.us/img364/856/cuore.jpg[/image]

f(x) = abs(asin(x)) and g(x) = π – abs(asin(2 (x + 0.5))) / 4 – 1.18 and h(x) = π – abs(asin(2 (x – 0.5))) / 4 – 1.18

(via Bazinga! grazie a Gecko)