根号下(1-x^2)dx/x^2的不定积分 dx/根号下1-x^2的不定积分 请用第二次换元法求,谢谢!


∫敬轮 (√(1-x^2) /x^2) dx
let
x= siny
dx= cosy dy
∫ (√(1-x^2) /x^2) dx
= ∫ (coty)^2 dy
= ∫ [(cscy)^2 - 1] dy
= -coty - y + C
= - √(1-x^2) /x - arcsinx + C

∫ (1/√(1-x^2)) dx
let
x = siny
dx = cosy dy
∫ (1/盯腔√(1-x^2)) dx
=∫亮则信 dy
=y + C
= arcsinx + C