∫x*(cos^2x)dx

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/11/19 12:13:39

∫x*(cos^2x)dx

分步积分吧
∫x*(cos^2x)dx
=1/2∫x*(1+cos2x)dx
=1/4x^2+1/2∫x*cos2xdx
=1/4x^2+1/4∫x*dsin2x
=1/4x^2+1/4x*sin2x-1/4∫sin2xdx
=1/4x^2+1/4x*sin2x+1/8cos2x+C

cos(x^2)dx ∫x／[(cos^2)x]dx ∫sin(x) cos^2(x)dx ∫ (1+cos^2 x)/cos^2 x dx = 求∫2/(2+cos x)dx 求:∫cos^2(2x)dx ∫(1-cos^(2)2x)dx ∫(2/cos^2x)dx= ∫cos^2(2x)dx ∫cos^2(x/2)dx ∫cos(x+2)dx=多少 ∫dx/cos^2√x