A tangent line from the point to the circle touches the circle at the point . Compute .

Credits – Southern California ARML, Oct. 2009, Individual round

I dream amongst the stars; but wake beneath the sky

A tangent line from the point to the circle touches the circle at the point . Compute .

Credits – Southern California ARML, Oct. 2009, Individual round

Advertisement

Okay, so maybe it wasn’t

thateasy.I got this problem wrong myself, so yeah.

Hanchan heroicly solved it!

It seems this is actually kind of difficult… harder than I thought >.>”