Trigonometry Values Pi/3
From
Trigonometry Values Pi/6
(1)
(2)
together with the trigonometric identity
(3)
the identity
(4)
is obtained. Using the identity
(5)
then gives
(6)
Summarizing,
(7)
(8)
(9)
See also
Equilateral Triangle
© 1996-9
Eric W. Weisstein
1999-05-26