JS Practice — Built-in Objects

Math.cos(Math.PI/3) ≈ 0.5

📖 Usage Example

// Cosine of an angle in radians
Math.cos(0)          // → 1
Math.cos(Math.PI)    // → -1

Use Math.cos() to compute the cosine of an angle (in radians) for trigonometry and graphics.

Math.cos(x)

Math.cos(Math.PI / 3) returns approximately 0.5 (cos 60° = 0.5).

Challenge: Verify that Math.cos(Math.PI / 3) is approximately 0.5.

💡 Hints (2)