∫dx/cos^2(tanx-1)^1/2等于?

∫dx/cos^2(tanx-1)^1/2 等于? ∫dx/cos^2(tanx-1)^1/2等于? 求∫tanx/(1-(tanx)^2)dx 为什么 求不定积分∫sinx/cos^3x dx 答案不是1/2tanx^2原式=∫tanx(secx)^2dx =∫tanxd(tanx) ∫dx/(1+tanx) 求cos(1+tanx)dx不定积分 tanx/(cos^2)x dx ∫tanx(tanx＋1)dx ∫sin^2x(1+tanx)dx 求不定积分?∫(tanx-1)^2dx ∫(secx/1+tanx)^2dx ∫dx/(1+tanX)=? 1.∫ [sin(2x)]^2 dx 2.∫(1-tanx)/(1+tanx) dx (tanx+1/tanx)cos^2 x等于 (tanx+1/tanx)cos^2 x等于 tanx^2积分除了这种方法∫(tanx)^2dx=∫[(secx)^2-1]dx=tanx-x+C 求问,∫sec^2xdx=∫(1/cos^2x)dx=tanx+C的推导过程~谢谢~ ∫(tanx)^2dx