The Dirichlet Integral Marathon! int sinx/x from 0 to infty in 5 different ways

The Dirichlet integral is one of the coolest integrals in existence and its various solution developments are indeed mesmerising! Comment down below which technique you liked best Jordan's lemma:    • Complex Analysis: Jordan's Lemma      • Jordan's Lemma Proof | Complex Variables   Series expansion for csc function:    • Incredible infinite series!   Lobachevsky's formula:    • An amazing integration result: Lobachevsky...