曲線の長さ 演習1
x = 2( t - sin t ) , y = 2(1- cos t )
(0 ≦ t ≦ 2π)
y = { (2/3)x }3/2 (0 ≦ x ≦ 9/2)
y = ( ex + e-x ) / 2 (a ≦ x ≦ a+1)
(ハイレベル)
x = { (2/3)t }3 , y = t2 (0 ≦ t ≦ 1 )
x = 3t2 , y =3t - t3 (0 ≦ t ≦ √3 )
x = 2cos t , y = 2sin t (0 ≦ t ≦ 4π)