Integrate: [ sin³ 3x cos5 3x dx [sin³ 3x cos³ 3x dx = [ {ITEM D1} dx = [((ITEM D2]) cos5 3x sin 3x dx cos5 3x sin 3x dx - dx - √ cos² 3x sin 3x dx ſ Let u = cos 3x du dx =f cos (ITEM D3} {ITEM D4} = sin 3x dx = =√₁² (du)-[₁² (²) 3 3 ={ITEM D5} = {ITEM D6} + {ITEM D7}+C

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