📐 Unit Circle Visualizer

Adjust the angle slider to move the point around the circle. Watch how the right triangle changes to calculate Sine and Cosine!

Angle (θ)
45°
Cosine (X)
0.707
Sine (Y)
0.707
X Y
Angle (θ)
45°

🧠 How it works

  • The circle has a radius of exactly 1 (the hypotenuse).
  • Cosine measures the horizontal distance along the X-axis to the point.
  • Sine measures the vertical distance along the Y-axis to the point.
  • Notice how they flip between positive and negative depending on which quadrant the point is in!