Evaluate the integral: 25√x² x4 81 - dx (A) Which trig substitution is correct for this integral? Ox = 81 sec (0) O x = 9 sin(0) Ox = 25 sin(0) 0x = = 9 tan(0) Ox = 9 sec (0) Ox = 81 tan (0) (B) Which integral do you obtain after substituting for x 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 x? +C

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