Theta Calculator — A Simple Interactive Demo

The Idea

Sometimes you need a quick way to convert angles. Degrees ↔ radians. Maybe compute sin(θ) or cos(θ). Here's a tiny interactive demo built right into the blog.

The Demo

The Code

function degreesToRadians(deg) {
  return (deg * Math.PI) / 180;
}

function radiansToDegrees(rad) {
  return (rad * 180) / Math.PI;
}

// θ in radians
const theta = degreesToRadians(45);
console.log(Math.sin(theta)); // ~0.707

Why θ?

Theta (θ) is the classic variable for angles. It shows up everywhere: trig, physics, rotations. This little calculator is a nod to that—and a chance to try interactive components in the blog itself.

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