∫ xcos(x/3) dx ...

∫ xcos(x/3) dx ... ∫ arccos7x dx∫ xcos(2-x) dx∫ sinx/(5+3sinx) dx 求不定积分∫xcos(x^2)dx ∫sin²xcos³x dx ∫xcos(x+1)dx的不定积分 ∫xcos(x-1)dx不定积分 ∫xcos（x/2）dx 求∫xcos^2(x)dx= ∫xcos(1+x^2)dx= ∫xcos(2x^2 -1)dx 求∫xcos²x dx 求定积分∫(1/sin^2xcos^2x)dx上标派/3下标派/4 ∫xcos（1+x²）dx大神求解 求不定积分：∫xcos(4x^2 +5)dx 求不定积分,∫sin^2xcos^2x dx ∫(1/sin²xcos²x)dx怎么求, ∫(1/sin³xcos³x)dx 怎么解 ∫xcos(2x)dx=?求过程qwq