∫{（1/cos^2x）-1}dx

∫1/(1+cos^2(x)) dx ∫(1-cos^(2)2x)dx ∫(1+sinx) / cos^2 x dx ∫{（1/cos^2x）-1}dx / (cos x + 1 ) dx ∫(1+sin^2x)/(cos^2x)dx ∫[1/(sin^2(x)cos^4(x)]dx 求解∫1/(cos^4(x)sin^2(x))dx ∫ x cos(x^2 + 1)dx 请问怎决解? ∫ cos(x-1)dx、 ∫ x^3e^x^2dx怎么解 ∫1/1-cos x dx ∫(1-sin/x+cos)dx不定积分 ∫cos((x/3)-1)dx=? ∫cos(3x-1)dx 不定积分cos(x^1/2)dx=? 求不定积分∫[1/(sin^2 cos^2(x)]dx 求不定积分∫[1/sin^2cos^2 (x)]dx 求∫cos（3x+1）dx.