When calculating the integral shown, using trigonometric substitution method with 6x sen(B) = in the process of the solution you get: 14 196-36x² I = √³ -da Oa) I = ồ | cot®(5)dB Ob) I = 6 cot² (3) dB Oc) I = 6 ftan² (3) d Od) I = 1tan² (3)d8 6

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