# $ZCSC

## Synopsis

$ZCSC(n)

### Parameter

Argument | Description |
---|---|

n | An angle in radians. |

## Description

$ZCSC returns the trigonometric cosecant of n. The result is a signed decimal number.

## Parameter

### n

An angle in radians, specified as a nonzero number. It can be specified as a value, a variable, or an expression. Specifying 0 generates an <ILLEGAL VALUE> error; specifying $DOUBLE(0) generates a <DIVIDE> error. A non-numeric string is evaluated as 0.

## Examples

The following example permits you to compute the cosecant of a number:

```
READ "Input a number: ",num
IF num=0 { WRITE !,"ILLEGAL VALUE: zero not permitted" }
ELSE {
WRITE !,"the cosecant is: ",$ZCSC(num)
}
QUIT
```

The following example compares the results from Caché fractional numbers ($DECIMAL numbers) and $DOUBLE numbers. In both cases, the cosecant of pi/2 is exactly 1:

```
WRITE !,"the cosecant is: ",$ZCSC($ZPI)
WRITE !,"the cosecant is: ",$ZCSC($DOUBLE($ZPI))
WRITE !,"the cosecant is: ",$ZCSC($ZPI/2)
WRITE !,"the cosecant is: ",$ZCSC($DOUBLE($ZPI)/2)
WRITE !,"the cosecant is: ",$ZCSC($DOUBLE($ZPI/2))
```