1. - Evaluate the following integrals using a trigonometric substitution. Hint: complete the square for part b. a) f on da? b) fV932-1-693dx 1+3:2 (Note: A clever way to evaluate the rst integral is to add and subtract one to the numerator or use long division. No points will be given for these approaches.) 502+l1 1+9:2 1 1 / 1+9:2 da: [(1+$2 1+3?) dz 3: an 36+