How to Avoid Incorrect Results When Using T-SQL Trigonometric Functions in SQL Server

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Introduction

When working with T-SQL trigonometric functions in SQL Server, it’s important to be aware of potential pitfalls that can lead to incorrect results. These issues may not always be immediately apparent, but understanding their causes will help you avoid mistakes and ensure accurate calculations. This guide outlines common errors that arise, especially when dealing with angles in both degrees and radians, and provides practical tips to help you avoid them.

Common Issues with T-SQL Trigonometric Functions

When using T-SQL trigonometric functions like SIN(), COS(), and TAN(), it’s essential to be aware of how angles are represented. The most common