Definite integral problem?

Question

this is the last question on my assignment and i can't seem to get the right answer, help please

integral from 0 to 1/8: arcsin4x/(1-16x^2)^1/2 dx

thanks

Answer 1

Trigonometric table in sin30=1/2 and sin0= 0

Therefore

Answer 2

.

Therefore,   .