Recent content by lpheng

  1. L

    Undergrad It might simple to you, but i'm stuck.

    The question is something like this, find the: d/dx of sin-1 (X+a) /b. then evaluate, intergarte of X / (9-4x-x2) 1/2 & intergarte of X2 / (9-4x-x2) 1/2 What i get for the first part is, d/dx of sin-1 (X+a) /b = 1 / ( -X2/b2-2aX/b2-a2+b2/b2)1/2 Then I'm stuck. xD Sorry for the...