1. Calculate the integrals of:
where a and b are constants. hint: use double angle formula
2. consider the improper integral
integral from (2*sqrt(3)) to infiniti of: (24x^3)/(4+x^2)^(5/2) dx.
EDIT: Make an appropriate trigonometric substitution to convert into a proper integral. Hence determine its value.
Someone can help me with these please?