∫cos(x^2)dx=?

∫ (1+cos^2 x)/cos^2 x dx = ∫(2/cos^2x)dx= ∫cos(x+2)dx=多少 cos(x^2)dx ∫sin^3(x)cos^2(x)dx= ∫cos(x*x)dx=? ∫x* cos²x dx=? ∫x／[(cos^2)x]dx ∫sin(x) cos^2(x)dx ∫cos x / ( 1 + (sinx)^2 ) dx = 求∫2/(2+cos x)dx 求:∫cos^2(2x)dx