November 12th, 2012, 07:13 AM  #1 
Senior Member Joined: Sep 2011 Posts: 395 Thanks: 0  Trigonometric Ratios
The tables, or calculator, clearly shows that or . Is the books answer incorrect or did I miss something? Many thanks. Q. Using Mathematics Tables, write down the solutions of the equation in the interval . Attempt: Ans. 
November 12th, 2012, 10:52 AM  #2 
Senior Member Joined: Jul 2010 From: St. Augustine, FL., U.S.A.'s oldest city Posts: 12,211 Thanks: 520 Math Focus: Calculus/ODEs  Re: Trigonometric Ratios
Apparently, the book intended: or either that or the given solution is just wrong. 
November 12th, 2012, 10:56 AM  #3 
Senior Member Joined: Sep 2011 Posts: 395 Thanks: 0  Re: Trigonometric Ratios
Thanks for clearing that up. Much obliged.


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