November 6th, 2011, 10:43 AM  #1 
Guest Joined: Posts: n/a Thanks:  Trig identities
1. Prove: 1) 2) and 2. If prove that 
November 6th, 2011, 03:47 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 16,918 Thanks: 1253 
2. You need to know that the angles are in the first quadrant, so that and so that It follows that 
November 6th, 2011, 05:49 PM  #3  
Math Team Joined: Dec 2006 From: Lexington, MA Posts: 3,267 Thanks: 406  Re: urgent help Hello, noki! Quote: [color=beige]. . [/color] [color=beige]. . [/color] [color=beige]. . [/color] Quote: [color=beige]. . [/color] [color=beige]. . [/color] Quote: [color=beige]. . [/color] [color=beige]. . [/color] Quote:
 
November 7th, 2011, 01:41 AM  #4 
Guest Joined: Posts: n/a Thanks:  Re: urgent help
Woow! thanks a lot. 

Tags 
identities, trig 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Trig IDENTITIES  mathatesme  Trigonometry  3  January 13th, 2014 05:20 AM 
Trig identities  taylor_1989_2012  Trigonometry  4  March 4th, 2013 03:05 AM 
Trig Identities  Gokias  Trigonometry  10  July 13th, 2011 02:14 PM 
Trig Identities  jordanshaw  Algebra  1  October 15th, 2010 11:47 PM 
Trig Identities  jordanshaw  Algebra  4  October 15th, 2010 01:28 PM 