# COS

Revision as of 19:12, 7 September 2009 by imported>Clippy

Purpose: To return the cosine of the of a radian angle.

**Syntax:**
COS(x)

**Comments:**
x must be the radians. COS is the trigonometric cosine function. To convert from degrees to radians, multiply by π/180.

COS(x) is calculated in either single or double precision depending on its argument.

- COS(4)
- -.6536436

- COS(4#)
- -.6536436208636119

**Example 1:**

- X = 2 * COS(.4)
- PRINT X

*Result:* 1.842122

**Example 2:**

- PI = 3.141593
- PRINT COS(PI)
- DEGREES = 180
- RADIANS = DEGREES * PI / 180
- PRINT COS(RADIANS)

*Result:*

- -1
- -1