What is the value of cos(pi/4)? | Homework.Study.com
Values of trigonometric functions of arcs pi/6 pi/4 and p/3, The values of the trigonometric functions of arcs that are multipliers of 30 degrees (pi/6) and 45 degrees (pi/4
A Simple Trick To Remember Trigonometry Values - YouTube
Trigonometrical Ratios Table | Trigonometric Standard Angles |Standard
um math prep: s14.2 - function values
Course:MATH110/Archive/2010-2011/003/Groups/Group 11/Basic Skills: Trigonometric Functions - UBC Wiki
How do you simplify sin(pi/3)? | Socratic
Is there a formula for cos pi/2^n? - Quora
How to Find Exact Values for Trigonometric Functions: 9 Steps