∫X^2COS^2(X/2)dx等于多少?

∫X^2COS^2(X/2)dx等于多少? ∫cos(x+2)dx=多少 ∫(x^2+x)dx等于多少? cos(x^2)dx ∫x*(cos^2x)dx ∫x／[(cos^2)x]dx ∫sin(x) cos^2(x)dx tanx/(cos^2)x dx cos*2X等于多少 ∫cos^2(x/2)dx 求∫2/(2+cos x)dx 求:∫cos^2(2x)dx ∫(1-cos^(2)2x)dx ∫(2/cos^2x)dx= ∫xsinx/cos^2x dx ∫(1+sinx) / cos^2 x dx 求不定积分：∫cos x^2 dx ∫1/(1+cos^2(x)) dx