# COS

Revision as of 19:08, 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

RUN

1.842122

**Example 2:**

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

RUN

-1 -1