SalasSV_09_08_ex_ans

2 27 a 24a b use the identities cos 3 4 cos3 3 cos

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Unformatted text preview: al speed 2, terminal speed 2 eπ ; s = 2(eπ − 1) 21. initial speed 0, terminal speed 25. 8a 13; x = 1 (13 27 √ 13 − 8) 29. 2π 27. (a) 24a (b) use the identities cos 3θ = 4 cos3 θ − 3 cos θ , sin 3θ = 3 sin θ − 4 sin3 θ √ √ √ 4π 1 1 7 33. 2 5(e − 1) 35. 4 − 2 2 37. ln (1 + 2) 39. c = 1 41. (a) ( 2 , − 2 ) 43. L = a b√ 31. √ 2(e4π − 1) 1 + sinh2 x dx = a b√ cosh2 x dx = a b cosh x dx = A 45. L ∼ 4. 6984 = 47. (a) y (b) 2.7156 x 49. 4 51. (b) 28.3617 53. 1 + [ f (x)]2 = 1 + tan2 [α (x)] = | sec [α (x)]|...
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