Re: [積分] 幾題積分

看板trans_math作者 (^______^)時間17年前 (2007/03/06 00:58), 編輯推噓0(000)
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※ 引述《walolo (有緣無份)》之銘言: : sin^2θ : 1.∫ ----------- dθ : cosθ : cos2t : 2.∫-----------dt : sin^42t : 3.∫θ√1-cosθ dθ ∫(θ)(√(1 - cosθ)) dθ = ∫(θ)(√(1 - (1 - (2)((sin(θ/2))^2)))) dθ = ∫(θ)(√((2)((sin(θ/2))^2))) dθ = ∫(θ)(√2)(sin(θ/2)) dθ = (√2)(∫(θ)(sin(θ/2)) dθ) = (√2)((-2)(θ)(cos(θ/2)) - ∫(-2)(cos(θ/2)) dθ) = (√2)((-2)(θ)(cos(θ/2)) - (-4)(sin(θ/2))) + c = (√2)((-2θ)(cos(θ/2)) + (4)(sin(θ/2))) + c = (-2)(√2)(θ)(cos(θ/2)) + (4√2)(sin(θ/2)) + c : dx : 4.∫----------- : x√x^2-16 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.66.173.21
文章代碼(AID): #15x4maV4 (trans_math)
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文章代碼(AID): #15x4maV4 (trans_math)