Math problem where graphing calculator may slow you down - part II.

[Thomas Klemm]

My solution by hand: \(2\pi+\arccos(3\sqrt{2}-4)\)
This is about: 7.6089
I used the HP-15C with this program to calculate the function:

Code:

LBL A
1
->R
x<y
x<>y
RTN

And then another program to calculate the integral which I finally used with the solver.

Cheers
Thomas