1 cos sin sin sin 1 5 sin5 cos5 35 Evaluate 21 1 2 6 2 1 12 1 1 2 2 1 1 2 1 2

1 cos sin sin sin 1 5 sin5 cos5 35 evaluate 21 1 2 6

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?? = 1 ?? = cos ? ? = sin ? ∫ ? ?? = ?? − ∫ ? ?? = ?(sin?) − ∫ sin ? (1) = 5? sin(5?) − (− cos(5?)) + ? ∫ ??? 𝐜?? ?? ?? = ?? ?𝐢?(??) + 𝐜??(??) + ? 35. Evaluate 2?−1 (?+1) 2 ?? /6 2? − 1 (? + 1) 2 = ? ? + 1 + ? (? + 1) 2 2? − 1 = ?(? + 1) + ? 2? − 1 = ?? + ? + ? ? = 2 ? + ? = −1 2 + ? = −1 ? = −3 2? − 1 (? + 1) 2 ?? = ∫ 2 ? + 1 ?? + ∫ − 3 (? + 1) 2 = ? ??(|? + ?|) + ? ? + ? + ?
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