Evaluate the following integral using trigonometric substitution. √81-x² What substitution will be the most helpful for evaluating this integral? OA. x 9 sec 0 OB. x=9 sin 0 OC. x=9 tan! Rewrite the given integral using this substitution. dx S- 2 dx 81-x (Type an exact answer.) Evaluate the integral. = 2 do √81-x (Type an exact answer.)

Q: dx 2 X + 4

A: Topic = Integration

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