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**1.a Homework Statement**

∫(a*sin(14x))/([itex]\sqrt{1-196x^2}[/itex] dx, evaluated at x=0 (lower limit) and x=1/28 (upper limit), where "a" is a constant.

**2.a Relevant equations**

I've defined u as 14x, and dx=du/14; thus u(0)=0 and u(1/28)=14

**3.a The attempt at a solution**

Using this definition of u, I've been able to get the problem to this point:

[itex]\frac{1}{14}[/itex]∫a*sin(u)*(1-u^2)^(-1/2), evaluated at an upper limit of 1/2 and a lower limit of 0

From here, I'm stumped. Am I using the wrong definition of u, or is there something I'm missing?

Thanks for any help,

Ell