What is the syntax for CSC in Excel?

The syntax for CSC is: =CSC(number)

How do I use the CSC function?

To use CSC, type =CSC( in a cell and provide the required arguments. Excel will show you the syntax and parameter hints as you type. Make sure to close the parentheses and press Enter to execute the function.

What happens if CSC encounters errors?

If CSC encounters invalid arguments or calculation errors, it may return error values like #VALUE!, #NUM!, or #DIV/0!. Check your input values and ensure they meet the function's requirements.

Why is CSC not working in my Excel?

Common issues with CSC include #DIV/0! when sine is 0. Start by checking the syntax =CSC(number), then verify each referenced cell or range.

Math & Trig

CSC Function in Excel

Returns the cosecant of an angle in radians.

Syntax

=CSC(number)

Arguments

number (required): Angle in radians

Examples

=CSC(PI()/6) - Cosecant of 30 degrees - Result: 2

CSC in reporting workflows

Use absolute references when copying formulas across rows.
For conditional totals see [SUMIF](/functions/sumif/) and [SUMIFS](/functions/sumifs/).
Filtered lists may need [SUBTOTAL](/functions/subtotal/) instead of SUM on visible cells only.

Common errors

#DIV/0! when sine is 0

Use cases

Trigonometry
Engineering
Physics

Frequently asked questions

What is the CSC function in Excel? CSC returns the cosecant of an angle in radians. The syntax is =CSC(number). Typical use cases include trigonometry, engineering, physics.
How do I use the CSC function? To use CSC, type =CSC( in a cell and provide the required arguments. Excel will show you the syntax and parameter hints as you type. Make sure to close the parentheses and press Enter to execute the function.
What happens if CSC encounters errors? If CSC encounters invalid arguments or calculation errors, it may return error values like #VALUE!, #NUM!, or #DIV/0!. Check your input values and ensure they meet the function's requirements.
Why is CSC not working in my Excel? Common issues with CSC include #DIV/0! when sine is 0. Start by checking the syntax =CSC(number), then verify each referenced cell or range.

Editorial review

Reviewed by Excel.Directory Editorial Team. Updated May 2026.