I'm 16 and in high school. I've never taken physics or anything before. I have this equation that shows that pi = infinity times zero Ok. So if u take a circle with a diameter of 1 and draw equal spaced radius' and connect them you get a polygon with all equal sides. the more radius' you draw the more sides the polygon has and the closer the perimeter gets to pi the formula for the perimeters of these polygons is: n(-.5(cos(360/n)-1))^.5 where n is the number of sides of the polygon as n gets larger and larger in this equation it approaches pi. Like if you make n = 1000 you get the first 5 digits of pi correct. we can say then that: infinity(-.5(cos(360/infinity)-1))^.5 = pi 360/infinty = 0 and cos(0) = 1 so this simplifies to... infinity(-.5(1-1))^.5 = infinity(-.5(0)^.5) = infinity(0) so therefore infinity(0) = pi my calculater says infinity(0) is undefined so i don't get it. How am i wrong?