∫cos^3x dx ∫tan^3xsecx dx

∫cos^3x dx ∫tan^3xsecx dx ∫tan^3x dx ∫[tan(3x+1)/cos^2(3x+1)]dx如何计算, 两道不定积分的题(1)∫(1-tan x)/(1+tan x)dx(2)∫1/[5(cos x)^2+3(sin x)^2]dx 不定积分 ∫ x*cos(x/3)*dx 求助∫d/dx[X^tan(x^2)]dx 和 ∫dx/(2+3X^2) ∫cos x / ( 1 + (sinx)^2 ) dx = ∫x^3 / ( 1 + x^4 ) dx = ∫(sec x)^3 * tan x dx = ∫x^2 * e^(-2x) dx = ∫x * cos 2x dx = ∫(cos 2x)^2 dx = ∫(13x - 6) / ( x (x-2)(x+3) )dx = ∫(x^2 + 2x - 2) / ((x-2)(x+1)) dx = 请把过程写出来哈.>< 旷 这个怎恶魔算∫cos x / ( 1 + (sinx)^2 ) dx = ∫x^3 / ( 1 + x^4 ) dx = ∫(sec x)^3 * tan x dx = ∫x^2 * e^(-2x) dx = ∫x * cos 2x dx = ∫(cos 2x)^2 dx = ∫(13x - 6) / ( x (x-2)(x+3) )dx = ∫(x^2 + 2x - 2) / ((x-2)(x+1)) dx = ∫（sin x 分之一）dx=?∫（tan x分之一）dx=?.cos x. ∫(sinx/cos^3x)dx ∫cos((x/3)-1)dx=? ∫cos(3x-1)dx ∫(sec x)^3/tan x dx= ∫(1+tan^2x)dx/(1+tanx)^3 求积分 ∫tanˆ3 x*secx dx 求不定积分：∫(sin x/cos^3 x)dx ∫e^(2x)cos(3x)dx ∫(cos^3x/sin^2x)dx