Help me with this integral and differentation problem?

Question

d/dx [Si(x^2)]

Please tell me how to find this step by step

Answer 1

Si? Are you referring to the sine integral? If so, you need only remember two things:
Differentiation is the inverse of integration
d/dx f(g(x)) = f'(g(x)) * g'(x)

So:

d/dx (Si(x²)) = sin (x²)/(x²) * 2x

Answer 2

Whats Si?

Answer 3

[cos (x^2) ]* 2x