Difference between revisions of "Documentation/How Tos/Calc: ATAN function"

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== ATAN ==
 
== ATAN ==
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Returns the inverse tangent (the arctangent) of a number.
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Returns the inverse tangent (the arc tangent) of a number.
  
 
=== 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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{{SeeAlso|EN|
 
* [[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]]
 
* [[Documentation/How_Tos/Calc: Functions listed alphabetically|Functions listed alphabetically]]
 
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* [[Documentation/How_Tos/Calc: Functions listed by category|Functions listed by category]]}}
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[[Category: Documentation/Reference/Calc]]
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[[Category: Documentation/Reference/Calc/Mathematical functions]]

Latest revision as of 14:22, 31 January 2024

ATAN

Returns the inverse tangent (the arc tangent) of a number.

Syntax:

ATAN(number)

returns the inverse trigonometric tangent of number, in other words the angle (in radians) whose tangent is number. The angle returned is between -PI/2 and PI/2.
To return the angle in degrees, use the DEGREES function.

Example:

ATAN(1)

returns 0.785398163397448 (PI/4 radians).

DEGREES(ATAN(1))

returns 45. The tangent of 45 degrees is 1.


See Also
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