$\arccos \sqrt{\cfrac{1+\sqrt{\cfrac{1+\sqrt{\cfrac{1-\sqrt{\cfrac{1+\cfrac{\sqrt{3}}{2}}{2}}}{2}}}{2}}}{2}}$
Please give the answer in radians.
The problem has been posted here: https://web2.0calc.com/questions/pre-calc-problem
+25 
