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Template:Cos/doc
From OeisWiki
The {{cos}} circular function template returns the cosine of , where is a real number expressing a circular angle in radians.
Note that you may also use the cos operator (used within the {{#expr: }} parser function extension, e.g. {{#expr: cos (pi/6) }}) which also takes a circular angle in radians as argument.
Contents
Usage
- {{cos|a real number}}
Valid input
- A real number (expressing a circular angle in radians) as argument.
Examples
Examples with valid input
Code Result {{cos|-5*pi/2}} 3.0616169978684E-16 {{cos|-pi/2}} 6.1232339957368E-17 {{cos|-pi/3}} 0.5 {{cos|-pi/4}} 0.70710678118655 {{cos|-pi/6}} 0.86602540378444 {{cos|0}} 1 {{cos|pi/6}} 0.86602540378444 {{cos|pi/4}} 0.70710678118655 {{cos|pi/3}} 0.5 {{cos|pi/2}} 6.1232339957368E-17 {{cos|5*pi/2}} 3.0616169978684E-16
Examples with invalid input (returns an error message)
Code Result {{cos|i}} Expression error: Unrecognized word "i".
Code
Currently (using built-in error message)
{{#expr: cos ({{{1}}}) }}
instead of (using custom error message)
{{ifnum| {{{1|NAN}}} | {{#expr: cos ({{{1}}}) }} | {{error| Cos error: Argument must be a real number (circular angle in radians) }} }}
See also