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

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== ACOS ==
 
== ACOS ==
 
Returns the inverse cosine (the arccosine) of a number.
 
Returns the inverse cosine (the arccosine) of a number.
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=== Syntax: ===
 
=== Syntax: ===
 
<tt>'''ACOS(number)'''</tt>
 
<tt>'''ACOS(number)'''</tt>
  
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:<tt>'''ACOS'''</tt> returns the inverse trigonometric cosine of <tt>'''number'''</tt>, in other words the angle (in radians) whose cosine is <tt>'''number'''</tt>. The angle returned is between <tt>'''0'''</tt> and <tt>'''PI'''</tt>.
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: returns the inverse trigonometric cosine of <tt>'''number'''</tt>, in other words the angle (in radians) whose cosine is <tt>'''number'''</tt>. The angle returned is between <tt>'''0'''</tt> and <tt>'''PI'''</tt>.
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:To return the angle in degrees, use the <tt>'''DEGREES'''</tt> function.
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: To return the angle in degrees, use the <tt>'''DEGREES'''</tt> function.
  
 
=== Example: ===
 
=== Example: ===
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: returns <tt>'''60'''</tt>. The cosine of <tt>'''60'''</tt> degrees is <tt>'''0.5'''</tt>.
 
: returns <tt>'''60'''</tt>. The cosine of <tt>'''60'''</tt> degrees is <tt>'''0.5'''</tt>.
  
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{{SeeAlso|EN|
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* [[Documentation/How_Tos/Calc: COS function|COS]]
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* [[Documentation/How_Tos/Calc: SIN function|SIN]]
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* [[Documentation/How_Tos/Calc: TAN function|TAN]]
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* [[Documentation/How_Tos/Calc: COT function|COT]]
  
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=== See also: ===
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* [[Documentation/How_Tos/Calc: ASIN function|ASIN]]
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'''[[Documentation/How_Tos/Calc: COS function|COS]]''',
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* [[Documentation/How_Tos/Calc: ATAN function|ATAN]]
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'''[[Documentation/How_Tos/Calc: SIN function|SIN]]''',
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* [[Documentation/How_Tos/Calc: ATAN2 function|ATAN2]]
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'''[[Documentation/How_Tos/Calc: TAN function|TAN]]''',
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* [[Documentation/How_Tos/Calc: ACOT function|ACOT]]
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'''[[Documentation/How_Tos/Calc: COT function|COT]]''',
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'''[[Documentation/How_Tos/Calc: ASIN function|ASIN]]''',
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* [[Documentation/How_Tos/Calc: DEGREES function|DEGREES]]
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'''[[Documentation/How_Tos/Calc: ATAN function|ATAN]]''',
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* [[Documentation/How_Tos/Calc: PI function|PI]]
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'''[[Documentation/How_Tos/Calc: ATAN2 function|ATAN2]]''',
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'''[[Documentation/How_Tos/Calc: ACOT function|ACOT]]'''
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'''[[Documentation/How_Tos/Calc: DEGREES function|DEGREES]]''',
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* [[Documentation/How_Tos/Calc: Mathematical functions|Mathematical functions]]
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'''[[Documentation/How_Tos/Calc: PI function|PI]]'''
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'''[[Documentation/How_Tos/Calc: Mathematical functions|Mathematical functions]]'''
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* [[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/Mathematical functions]]

Latest revision as of 14:19, 31 January 2024

ACOS

Returns the inverse cosine (the arccosine) of a number.

Syntax:

ACOS(number)

returns the inverse trigonometric cosine of number, in other words the angle (in radians) whose cosine is number. The angle returned is between 0 and PI.
To return the angle in degrees, use the DEGREES function.

Example:

ACOS(-1)

returns 3.14159265358979 (PI radians).

DEGREES(ACOS(0.5))

returns 60. The cosine of 60 degrees is 0.5.


See Also
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