Evaluate the integral: V49-x2dr (A) Which trig substitution is correct for this integral? Or = 49 tan(@) Or = 7 sec(0) Or = 7 tan(0) Or = 49 sin(0) Or = 49 sec(0) Or = 7 sin(0) (B) Which integral do you obtain after substituting for x and simplifying? Note: to enter 0, type the word theta. de C) What is the value of the above integral in terms of ? + C D) What is the value of the original integral in terms of x? + C