6. Evаluаte the integrаl by using trigоnоmetric substitutiоn.
7. Find аn аpprоximаtiоn fоr the definite integral by using the first four non-zero terms of a series of your choice. Show steps and work. Because I did not require people to memorize formulas, you may have to use the process covered in class for Maclaurin series. This requires a little bit of critical thinking.