- #1
Raghav Gupta
- 1,011
- 76
Homework Statement
Find ## \sum_1^{23} tan^{-1}(\frac{1}{n^2+n+1}) ##
Homework Equations
## tan^{-1}x + tan^{-1}y = tan^{-1}(\frac{x+y}{1-xy} )##
The Attempt at a Solution
I think we have to split the question in a form of relevant equation given above.
First thing what should I do?