| Manifesto | Bookstore | Contents | Amazon store | Term index | What changed? | Contact | Recommend |
Date: Saturday, January 25, 1997 1:52 AM
From: Calvin Lui
I am Ronald who born in H.K.I have a math problem. Could you please help me to solve it .The question is as following: prove that:
cos 3a / sin a + sin 3a/cos a = cot a - tan a
Copyright © 1996-2009 Alexander Bogomolny
| 34385495 |  |
