## What is ATAN2 used for?

atan2() function returns the angle in the plane (in radians) between the positive x-axis and the ray from (0,0) to the point (x,y), for Math.

## How is ATAN2 calculated?

The atan2 function calculates one unique arc tangent value from two variables y and x, where the signs of both arguments are used to determine the quadrant of the result, thereby selecting the desired branch of the arc tangent of y/x, e.g., atan2(1, 1) = π/4 and atan2(−1, −1) = −3π/4.

## What is the difference between atan and ATAN2 in Excel?

Difference Between ATAN and ATAN2

For points in the second and third quadrants of the coordinate system, the ATAN function will return the angle relative to the negative x-axis direction. The ATAN2 function, by comparison, returns the angle relative to the positive x-axis which is the standard for measuring angles.

## What is atan and ATAN2?

Description. The atan() and atan2() functions calculate the arctangent of x and y/x , respectively. Return Value. The atan() function returns a value in the range -π/2 to π/2 radians. The atan2() function returns a value in the range -π to π radians.

## Does atan2 return radians or degrees?

The Math. atan2() method returns the arctangent of the quotient of its arguments, as a numeric value between PI and -PI radians. The number returned represents the counterclockwise angle in radians (not degrees) between the positive X axis and the point (x, y).

## What is the inverse of atan2?

P = atan2( Y , X ) returns the four-quadrant inverse tangent (tan1) of Y and X , which must be real. The atan2 function follows the convention that atan2(x,x) returns 0 when x is mathematically zero (either 0 or -0 ).

## Is atan2 better than atan?

In conclusion, if you are calculating something that ranges between -90 and 90 degrees like latitude, use arctan. If calculating an angle that can be between -180 and 180 degrees, use arctan2.

## Can atan2 be negative?

A positive result represents a counterclockwise angle from the x-axis; a negative result represents a clockwise angle. ATAN2(a,b) equals ATAN(b/a), except that a can equal 0 in ATAN2.

## What is atan2 Matlab?

atan2( Y , X ) computes the four-quadrant inverse tangent (arctangent) of Y and X . If Y and X are vectors or matrices, atan2 computes arctangents element by element.