Helpful Hints: For #'s 1-5, no need to apply the substitution technique. impressi As for #'s 6-10, you need to. 1. 3 (tan x-sec x) - dx 5 cos x 6. S VBx - 3 dx 2. (x+6)(x2-1) -dx 7. fx? (5 + 2x3) dx 3. J(4x + # ) dx 8. f 4x2 (1-823)4 dx 4. [cos x-sin x costx-sint, dx 9. fx V1 + x dx 5. (2 cot x-3 sindx 10. tan x dx sin x Helpful Hint: For #'s 11 and 12, recall/apply the five cases that we discussed involving TRIGONOMETRIC TRANSFORMATIONS. 11. [ sin1007x cos37x dx 12. J sec6 3x [sec? (5x) - tan?(5x)] dx