関連ワード:  integration of tan x secant 2 x    integration of tan x sec 2 x    integration of tan x sec 2 x dx    integration of tan x cos 2 x    integration of tan 3 x sec 2 x dx    integration of tan 3 x * sec 2 x    integration of e tan x * sec 2 x dx    integration of e ^ tan x * tan x * sec ^ 2x    integration of tan 2 x sec 2 x 1 10 6x dx    integration of tan 2x cos 2 x