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== ATAN2 ==
 
== ATAN2 ==
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Returns the inverse tangent (the arctangent) for specified x and y coordinates.
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Returns the inverse tangent (the arc tangent) for specified x and y coordinates.
  
 
=== Syntax: ===
 
=== Syntax: ===
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: returns <tt>'''45'''</tt>. The tangent of <tt>'''45'''</tt> degrees is <tt>'''1'''</tt>.
 
: returns <tt>'''45'''</tt>. The tangent of <tt>'''45'''</tt> degrees is <tt>'''1'''</tt>.
  
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* [[Documentation/How_Tos/Calc: COS function|COS]]
 
* [[Documentation/How_Tos/Calc: COS function|COS]]
 
* [[Documentation/How_Tos/Calc: SIN function|SIN]]
 
* [[Documentation/How_Tos/Calc: SIN function|SIN]]
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* [[Documentation/How_Tos/Calc: Functions listed alphabetically|Functions listed alphabetically]]
 
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Latest revision as of 14:23, 31 January 2024

ATAN2

Returns the inverse tangent (the arc tangent) for specified x and y coordinates.

Syntax:

ATAN2(x_coord; y_coord)

x_coord is the value of the x coordinate.
y_coord is the value of the y coordinate.
ATAN2 returns the inverse trigonometric tangent, that is, the angle (in radians) between the x-axis and a line from point x_coord, y_coord to the origin. The angle returned is between -PI and PI.
To return the angle in degrees, use the DEGREES function.

Example:

ATAN2(20; 20)

returns 0.785398163397448 (PI/4 radians).

DEGREES(ATAN2(12.3; 12.3))

returns 45. The tangent of 45 degrees is 1.


See Also
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