tan(pi/8), using half angle formula of tangent - YouTube
Arctan Formula, Function & Symbol | What is Arctan? - Video & Lesson Transcript | Study.com
If you get a maths question asking you to convert 3/pi radians into degree measure? Which value of pi will you take 3.142 or 180° In its solution 3/pi ×180°/pi…will the pi^2