ATAN2 Google Sheet Formula
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ATAN2 Formula Syntax
Example Use Case
Calculating the angle (in radians) from x and y coordinates for directional analysis
Understanding the ATAN2 Formula
The ATAN2 function in Excel computes the arctangent of y/x, using two arguments (x, y) to determine an angle in radians between -π and π. Unlike ATAN, it considers the quadrant based on the signs of both inputs, making it ideal for directional calculations like angles in coordinate systems.
Picture plotting a point (1, 1): ATAN2 finds its angle from the positive x-axis. It’s a step up from ATAN, offering full-circle precision for navigation, robotics, or graphics where direction matters.
Why Use ATAN2?
ATAN2’s quadrant awareness makes it perfect for polar coordinates or motion tracking. It’s a staple in programming and engineering, providing accurate angles without manual adjustments—essential for real-world spatial tasks.
Example with Sample Data
| X, Y | Formula | Result (radians) |
|---|---|---|
| 1, 1 | =ATAN2(1, 1) | 0.7854 |
| -1, 1 | =ATAN2(-1, 1) | 2.3562 |
| 0, -1 | =ATAN2(0, -1) | -1.5708 |
ATAN2 adjusts for quadrants: (1, 1) is ~0.7854 radians (45°), (-1, 1) shifts to 135°. It’s a directional standout.
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