x²/sqrt(9-x²)

u = x

a = 3

i used.... x=asinx

i end up substituting this into the problem....

x = theta

(3cosx)²/3cosx

i then reduce it to

3cosx and integrate it to get....

3sinx + c

now i use my triangle and solve in terms of x and now i get as a final awnser...

x + c

this doesnt seem right, can anyone verify this for me!