ATAN2(X, Y)

 

Description

This function returns the four-quadrant arc tangent of Y/X. At least one of the arguments must be non-zero.  The result is the angle (in radians) ranging between -PI and +PI.  To convert the result from radians to degrees, use the DEGREES function.

 

Parameters

 

X

A numeric value.

 

Y

A numeric value.

 

Examples

 

ATAN2(1, 1) = 0.78539816

 

ATAN2(A1, A2) = -0.78539816

Where A1 = 10 and A2 = -10.

 

ATAN2(D3, S5) = 1.5707963

Where D3 = 0 and S5 = 1.

 

ATAN2(0, 0) = #Error

One of the arguments must be non-zero.

 

DEGREES(ATAN2(1, 3)) = 71.565