This applet obviously indicates that a 45-45-90 triangle has [color=#9900ff][b]both legs congruent[/b][/color]. Yet what other two trigonometric ratios (i.e. trigonometric functions evaluated at 45 degrees) are also made apparent here?
[math]tan\left(45^{\circ}\right)=\frac{y}{x}=1[/math][br]and[br][math]cot\left(45^{\circ}\right)=\frac{x}{y}=1[/math]