cos(90° - 45°)/sin(90° - 45°)

cos(90° - 45°) = cos(45°) = $$\frac{\sqrt{2}}{2}$$
sin(90° - 45°) = sin(45°) = $$\frac{\sqrt{2}}{2}$$
Result: $$\frac{\sqrt{2}/2}{\sqrt{2}/2} = 1$$