You found that the reduction formula of a certain integral is 1 In x" sin 2x + nx"-1 cos 2x – n (n – 1) In-2 and that I =sin 2xWhat is I3 ? 4 2 O 1 3 x³ sin (2x) + x² cos (2x) + -sin (2x) 4 4 O1 3 -x³...

Extracted text: You found that the reduction formula of a certain integral is 1 In x" sin 2x + nx"-1 cos 2x – n (n – 1) In-2 and that I =sin 2xWhat is I3 ? 4 2 O 1 3 x³ sin (2x) + x² cos (2x) + -sin (2x) 4 4 O1 3 -x³ sin (2x) 3 2? cos (2æ) +sin (2æ) sin (2x) 4 O1 sin (2x) + x² cos (2x) 4 3 3 -sin (2x) 4 1 3 x² cos (2x) 4 3 " sin (2a) –° cos (2æ) – sin (2a) sin (2x) 4