# $ZCSC

Cosecant function.

## 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

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The following example compares the results from InterSystems IRIS 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))

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