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December 12th, 2007, 09:27 AM  #1 
Newbie Joined: Dec 2007 Posts: 5 Thanks: 0  Help on a trigo question
I got a question in my exams which says : "In a triangle ABC, tan A = 1, 2 cos B = 1. Find the value of angle C." I figure that if they're using trigonometric ratios on A and B, shouldn't angle C be 90° ? 
December 12th, 2007, 09:35 AM  #2 
Senior Member Joined: Oct 2007 From: France Posts: 121 Thanks: 1 
tan(A)=1 ===> A=? cos(B)=1/2 ===>B=? A+B+C=? ===> C=? 
December 12th, 2007, 09:45 AM  #3  
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