8. In each case use the given trigonometric substitution to evaluate the integral. You may assume that 0 < 0 < 5. (c) / ; (a) / ; - dx (put r = tan0] dx [put r = 5 cos 0] (a) (1+ x²) /25 – 22 ° (d) / tan 0] (b) JA- 12 dx [put x = 2 sin 6] dx [put x²/1+ x² r

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