# BASIC 256 - Language Documentation

en:cos

## Cos

### Format

cos ( expression )

### Description

Computes the cosine of expression. Expression must be in radians.

### Note

The cos function does not produce an exact result.

### See Also

Acos, Asin, Atan, Degrees, Radians, Sin, Tan

### Example

    clg
    color black
    # draw a line across the graphic output
    line 0,150,300,150
    # where do we start
    lastx = 0
    lasty = cos(0) * 50 + 150
    # now step across the line and draw
    for x = 0 to 300 step 5
       angle = x / 300 * 2 * pi
       y = cos(angle) * 50 + 150
       line lastx, lasty, x, y
       lastx = x
       lasty = y
    next x

Draws

en/cos.txt · Last modified: 2011/03/29 11:56 (external edit)