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: === | ||
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: To return the angle in degrees, use the <tt>'''DEGREES'''</tt> function. | : To return the angle in degrees, use the <tt>'''DEGREES'''</tt> function. | ||
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=== Example: === | === Example: === | ||
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<tt>'''DEGREES(ACOS(0.5))'''</tt> | <tt>'''DEGREES(ACOS(0.5))'''</tt> | ||
: 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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=== See also: === | === See also: === | ||
Revision as of 06:38, 2 March 2008
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.
