| Property | Value |
|---|---|
| Hex Value | $C4 |
| Categories | |
| Localizations |
|
cos(
Overview
Returns cosine of a real number, expression, or list.
Availability: Token available everywhere.
Syntax
cos(value)
Arguments
| Name | Type | Optional |
|---|---|---|
| value | real|expression|real[] |
Location
cos
Description
cos(θ) returns the cosine of θ, which is defined as the x-value of the point of intersection of the unit circle and a line containing the origin that makes an angle θ with the positive x-axis
The value returned depends on whether the calculator is in Radian or Degree mode. A full rotation around a circle is 2π radians, which is equal to 360°. The conversion from radians to degrees is angle180/π and from degrees to radians is angleπ/180. The cos( command also works on a list of real numbers.
In radians:
cos(π/3)
.5
In degrees:
cos(60)
.5
Advanced Uses
You can bypass the mode setting by using the ° (degree) and ʳ (radian) symbols. These next two commands will return the same values no matter if your calculator is in degrees or radians:
cos(60°)
.5
cos(π/3ֿ¹ )
.5
Error Conditions
- ERR:DATA TYPE is thrown if you supply a matrix or a complex argument.
- ERR:ARGUMENT is thrown if you use more than one number.
- ERR:DOMAIN is thrown if you supply an input ≥1E12.
Related Commands
See Also
Source: parts of this page were written by the following TI|BD contributors: burr, DarkerLine, GoVegan, Myles_Zadok, nap386, simplethinker, Xeda Elnara.
History
| Calculator | OS Version | Description |
|---|---|---|
| TI-82 | 1.0 | cos added |
| TI-83 | 0.01013 | Renamed cos to cos( |