# Basic Trigonometry problem

**URL:** <https://forum.kirupa.com/t/basic-trigonometry-problem/305170>\
**Category:** Uncategorized\
**Created:** [February 20, 2010, 6:33am UTC](https://forum.kirupa.com/t/basic-trigonometry-problem/305170 "2010-02-20T06:33:55Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![cnboy0212](https://avatars.discourse-cdn.com/v4/letter/c/bc79bd/32.png) [@cnboy0212](https://forum.kirupa.com/u/cnboy0212)\
**Post date:** [February 20, 2010, 6:33am UTC](https://forum.kirupa.com/t/basic-trigonometry-problem/305170/1 "2010-02-20T06:33:55Z")

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It’s been a while since I program, now i am having problem with a very basic trig question…

i am trying to rotate a point A around another point B  
and i forgot how to do that, any help?