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What is,  \( \arccos \sqrt{\cfrac{1+\sqrt{\cfrac{1-\sqrt{\cfrac{1-\sqrt{\cfrac{1+\cfrac{\sqrt{3}}{2}}{2}}}{2}}}{2}}}{2}}.\)?

 

All help is appreciated, thank you!

 Sep 20, 2020
 #1
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By a calcualator, the answer is 87.5 degrees.

 Sep 21, 2020
 #2
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arccos = 0.910863824 = 24.375 degrees = 0.42542401 radians

 Sep 21, 2020

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