26x2 Evaluate the integral: /81 – 2² (A) Which trig substitution is correct for this integral? Ox = 81 sec(0) Ox = 81 tan(0) Ox = 9 sec(0) Or = 9tan(0) %3| 81 sin(0) Ox = 9 sin(0) (B) Which integral do you obtain after substituting for a and simplifying? Note: to enter 0, type the word theta. de (C) What is the value of the above integral in terms of 0? + C (D) What is the value of the original integral in terms of æ? + C

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