∫(1,2)dx∫(√x,x)sin(πx/2y)dy+∫(2,4)dx+∫(√x,2)sin(πx/2y)dy其中（1,2）1是下限,2是上限.

∫sin^2x/(1+sin^2x )dx求解, ∫sin(1/x)dx ∫sin(√2x)dx ∫(1-sin^2( x/2))dx ∫(cosx／1+sin^2x)dx ∫sin^2x(1+tanx)dx ∫1/sin(x/2)dx ∫ x sin(x+1) dx ∫x/sin^2(x) dx ∫sin(x) cos^2(x)dx ∫1+sin^2x/1-cos2x dx∫1+sin^2x/1-cos2x dx ∫√(cotx+1)/(sin^2x)dx的不定积分 ∫1/√x*sin√x dx ∫1/ √X sin √x dx. ∫1/x^2 * sin 1/x dx ∫(1+sin^2x)/(cos^2x)dx ∫e^(-2x)sin(1/2x)dx 求∫1／tan^2x+sin^2x dx