1. The problem statement, all variables and given/known data This function of one variable need to be integrated: f(x)=1/(9+7*(sinx)^2) from x=0 to x=pi, without help with calculators or computer algebra software. 2. Relevant equations Have no idea. 3. The attempt at a solution Have no idea. I don't have any idea how to start. Please help with a hint :).