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Problem 4, Find, for 0-x-π, the arc-length of the segment of the curve R(t) = (2 cos t-cos 2t, 2 sin t-sin 2t) corresponding to 0< t < r

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Put u=tan (%) 今しー2E du duu Put u , 儿 Substitutinqf v and than 릎 +1 tant c) FS 2.et. Guven R2cstcos 2t, 今 (t) 2cos t-cos 2 t ら一251,n(t ヲ@t.). (2gin (20-2sn (t)) ニチcost- g cos (t) cas (21)+ チCos2 ( 2t) sin

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Problem 4, Find, for 0-x-π, the arc-length of the segment of the curve R(t) = (2...
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