49 -10 cos( v2:) 6. J25 dx Using the substitution 0 = \\, which of the following is equivalent to the above integral? Let VI > 0. O -5/3 cos(0) de O -20 fg cos(0) de O -10 fas cos(0) de O -10 625 cos(0) de O -20 fas cos(0) de 7. Given that So - f (4x) de = -8, which of the following must be true? O -Afd f (r) dr = -2 O -45 f (7) dr = 2 O -1516 f (r) dr = -8 O + fif () dr = -32 O 4fi f (r) dr = 8 8. Use algebraic methods to determine the value of the definite integral: [, - 6xle da = (Round to three decimal places.)1. f2 23v16 + at da = f, " du, after doing the substitution given by u = 16 + a4. O True O False 2. Evaluate the definite integral using the substitution u = sin(). Ja / 2 - cot(x) dr = 0 4 O In(4) - 1 O -In(2) O - In(#7) Oo 3. Evaluate the definite integral. J3x/4 cot'(x) da = O - 2 O O O -2- O 1 4. The integral fi 8e 4/3 In a| +(maj du, when evaluated, gives a negative number. O True O False 5. True or False: "- 3xv121 - a-de = 0? O True O False