7.3 Trigonometric Substitution22axd−∫xarises when finding the area of a circle or an ellipse (a>0), This can’t be done with regular substitution so we will look at a method of substitution called trigonometric substitution. There are some problems that can be done with either regular substitution or trig substitution. These are of a specific form - not just any integral with a square root. We will refer to the table on page 484 when working these problems. The examples we will do in class are #2,6,and 16.
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