June 23rd, 2017, 08:15 AM  #1 
Senior Member Joined: Aug 2014 From: Mars Posts: 101 Thanks: 9  Isosceles triangle?
Picture an isosceles triangle with two sides 8 and a base of 6. Is it equal to Sec $\frac{4}{3}$ Or what is it equal to? 
June 23rd, 2017, 08:35 AM  #2 
Senior Member Joined: Dec 2012 From: Hong Kong Posts: 853 Thanks: 311 Math Focus: Stochastic processes, statistical inference, data mining, computational linguistics 
What does 'it' refer to? 
June 23rd, 2017, 08:53 AM  #3 
Senior Member Joined: Aug 2014 From: Mars Posts: 101 Thanks: 9 
I don't know. The question was given without context. It was multiple choice and the four options were(I think)... $Cos$ 1 $Tan$ 1 $Sec \frac{4}{3}$ $Sec \frac{3}{4}$ If none of these work, then my memory is faulty. Let me know what you think the answer is. And what section of trigonometry it is so I can study it. 
June 23rd, 2017, 09:30 AM  #4 
Global Moderator Joined: Dec 2006 Posts: 18,953 Thanks: 1599 
Do you have any information about the origin of the question?

June 24th, 2017, 12:21 AM  #5 
Senior Member Joined: Aug 2014 From: Mars Posts: 101 Thanks: 9  
June 24th, 2017, 04:19 AM  #6 
Math Team Joined: Jul 2011 From: Texas Posts: 2,750 Thanks: 1400 
did you know that eyewitness testimony is seldom reliable because of missing details? the answer choices you think you saw make no sense w/regard to the isosceles triangle described. the two congruent base angles each have measure $\cos^{1}\left(\dfrac{3}{8}\right) = \sec^{1}\left(\dfrac{8}{3}\right)$ the vertex angle between the two equal legs has measure $2\sin^{1}\left(\dfrac{3}{8}\right)$ 

Tags 
isosceles, triangle 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Isosceles triangle  Hammad  Geometry  1  August 15th, 2016 10:03 AM 
isosceles triangle  farewell  Geometry  2  December 11th, 2014 02:21 PM 
right isosceles triangle  basim  Trigonometry  3  October 14th, 2014 03:44 PM 
Isosceles triangle  lithginte  Algebra  1  May 9th, 2012 06:34 AM 
Isosceles triangle help.  jordanshaw  Algebra  6  January 29th, 2011 04:14 PM 