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November 18th, 2017, 07:56 AM  #1 
Senior Member Joined: Dec 2015 From: Earth Posts: 194 Thanks: 23  sin1
How to prove? $\displaystyle \sin1<\log_{3} \sqrt{7}$ Last edited by skipjack; November 18th, 2017 at 09:31 AM. 
November 18th, 2017, 10:06 AM  #2 
Senior Member Joined: Dec 2015 From: holland Posts: 163 Thanks: 37 Math Focus: tetration 
sin1 = 0.8414709848... (ln7)/(2ln3) = 0.88562187458... Last edited by skipjack; November 18th, 2017 at 12:54 PM. 

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