JS Practice — Built-in Objects

Math.atan2(-1, 0) Equals -PI/2

📖 Usage Example

// Angle from positive x-axis to point (x, y)
Math.atan2(1, 1)   // → 0.7853... (π/4)
Math.atan2(0, 1)   // → 0

Use Math.atan2(y, x) to compute the angle of a point from the origin, correctly handling all quadrants.

Math.atan2(y, x)

Math.atan2(-1, 0) returns -Math.PI / 2 (-90°, pointing down the y-axis).

Challenge: Verify that Math.atan2(-1, 0) equals -π/2.

💡 Hints (2)