|
|
|
|
|
|
|
|
|
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
my e-mail address is: calvinl@hkstar.com
Copyright © 1996-2008 Alexander Bogomolny
| 28761153 |  |
|