Please Note: This article is written for users of the following Microsoft Excel versions: 2007, 2010, 2013, 2016, 2019, 2021, 2024, and Excel in Microsoft 365. If you are using an earlier version (Excel 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Excel, click here: Deriving a Secant and Cosecant.
Written by Allen Wyatt (last updated August 2, 2025)
This tip applies to Excel 2007, 2010, 2013, 2016, 2019, 2021, 2024, and Excel in Microsoft 365
Excel includes many built-in functions that allow you to use a wide range of trigonometric functions. If you need to determine either the secant or cosecant of an angle, you can use the SEC and CSC functions:
=SEC(A1) =CSC(A1)
The value in A1 must be the angle expressed in radians.
Both the SEC and CSC functions were introduced in Excel 2013. If you are using an older version of Excel you can use a simple formula to derive the values. Let's assume that an angle value, in radians, is stored in cell B7. To derive the secant of the angle, you can use the following formula:
=1/COS(B7)
Likewise, if you need to know the cosecant of the angle, the following formula will do the trick:
=1/SIN(B7)
ExcelTips is your source for cost-effective Microsoft Excel training. This tip (10084) applies to Microsoft Excel 2007, 2010, 2013, 2016, 2019, 2021, 2024, and Excel in Microsoft 365. You can find a version of this tip for the older menu interface of Excel here: Deriving a Secant and Cosecant.
Dive Deep into Macros! Make Excel do things you thought were impossible, discover techniques you won't find anywhere else, and create powerful automated reports. Bill Jelen and Tracy Syrstad help you instantly visualize information to make it actionable. You’ll find step-by-step instructions, real-world case studies, and 50 workbooks packed with examples and solutions. Check out Microsoft Excel 2019 VBA and Macros today!
Sometimes it is helpful to have a cell contain the maximum value that has ever occurred within changing data. This tip ...
Discover MoreText placed in cells can either be lowercase, uppercase, or a mixture of the two. If you want to count the cells based ...
Discover MoreSearching for a value using Excel's Find tool is easy; searching for that same value using a formula or a macro is more ...
Discover MoreFREE SERVICE: Get tips like this every week in ExcelTips, a free productivity newsletter. Enter your address and click "Subscribe."
There are currently no comments for this tip. (Be the first to leave your comment—just use the simple form above!)
Got a version of Excel that uses the ribbon interface (Excel 2007 or later)? This site is for you! If you use an earlier version of Excel, visit our ExcelTips site focusing on the menu interface.
FREE SERVICE: Get tips like this every week in ExcelTips, a free productivity newsletter. Enter your address and click "Subscribe."
Copyright © 2026 Sharon Parq Associates, Inc.
Please Note:
This article is written for users of the following Microsoft Excel versions: 2007, 2010, 2013, 2016, 2019, 2021, 2024, and Excel in Microsoft 365. If you are using an earlier version (Excel 2003 or earlier), this tip may not work for you. For a version of this tip written specifically for earlier versions of Excel, click here:
Comments