1. The problem statement, all variables and given/known data find the integral of (cscx)2 between pie/6 to pie/2 3. The attempt at a solution cot2x = 1 / sin2x * cos2x / cos2x which becomes.. tan2x * sec2x then i substituted u for tan x, and turned the integral into.. u2du = u3 / 3 which is.. tan3x / 3 between pie/6 and pie/2. However, tan is undefined at pie/6!! what do i do?