A circle can be defined as the locus of all points that satisfy an equation derived from Trigonometry. Interactive coordinate geometry applet. Includes a cool math ...
Area of a Circle. Calculator Enter the radius, diameter, circumference or area of a Circle to find the other three. The calculations are done "live": ...
2011/7/15 - In this video I try to explain what a function in maths is. I once asked myself, why keep writing y=f(x) and not just y!?? I've since realised that 'y' ...