PROBLEM 1 : A DEFINITE INTEGRATION PROBLEM MIXED WITH ITF PROPRTIES

The range of the function f(x) = ∫25_(-1)^1▒(sinx dp)/(1-2p cosx+p^2 ) is (1) [- π/2, π /2] (2) [0, π] (3) {0, π } (4) {- π /2,  π /2}