Question: please write every answer with question number Question 18 Use the substitution x - 3 tan(0) to evaluate the indefinite integral 26dx 2 Vx2 +

 please write every answer with question number Question 18 Use thesubstitution x - 3 tan(0) to evaluate the indefinite integral 26dx 2Vx2 + 9 +CQuestion 19 - 16 Evaluate the integral: da x2

please write every answer with question number

Vx2 + 64 (A) Which trig substitution is correct for this integral?Ox - 8 sin(0) Or = 8 tan(0) Or - - 16sec(0) Ox = 64 sin(0) Ox = 64 tan(0) Ox = 64

Question 18 Use the substitution x - 3 tan(0) to evaluate the indefinite integral 26dx 2 Vx2 + 9 +CQuestion 19 - 16 Evaluate the integral: da x2 Vx2 + 64 (A) Which trig substitution is correct for this integral? Ox - 8 sin(0) Or = 8 tan(0) Or - - 16 sec(0) Ox = 64 sin(0) Ox = 64 tan(0) Ox = 64 sec(0) (B) Which integral do you obtain after substituting for a and simplifying? Note: to enter 0, type the word theta. do (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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