Question: Please answer 11- 15 and please make it clean and readable please. ll.fa2x ds 12.1 Sec 3x Tan 3x dx 13. icos xdx 15. f(Sec4x-

Please answer 11- 15 and please make it clean and readable please.

ll.fa2x ds 12.1 Sec 3x Tan 3x dx 13. icos xdx 15. f(Sec4x- dr
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