主要内容

积分学

课程: 积分学 > 单元 4

课程 5: 弧长：极坐标曲线

极坐标曲线的弧长

极坐标曲线的弧长

下面哪个积分是上图中三瓣花朵的曲线 space, r, equals, 2, cosine, left parenthesis, 3, theta, right parenthesis, space在space, start color #df0030, start text, 第, I, 象, 限, end text, end color #df0030内的弧线长度?

(选择 A)
space, integral, start subscript, 0, end subscript, start superscript, start fraction, pi, divided by, 6, end fraction, end superscript, square root of, 4, cosine, squared, left parenthesis, 3, theta, right parenthesis, plus, 36, sine, squared, left parenthesis, 3, theta, right parenthesis, end square root, d, theta
(选择 B)
space, integral, start subscript, 0, end subscript, start superscript, start fraction, pi, divided by, 2, end fraction, end superscript, 2, cosine, squared, left parenthesis, 3, theta, right parenthesis, d, theta
(选择 C)
space, integral, start subscript, 0, end subscript, start superscript, start fraction, pi, divided by, 2, end fraction, end superscript, square root of, 4, cosine, squared, left parenthesis, 3, theta, right parenthesis, plus, 36, sine, squared, left parenthesis, 3, theta, right parenthesis, end square root, d, theta
(选择 D)
space, integral, start subscript, 0, end subscript, start superscript, start fraction, pi, divided by, 6, end fraction, end superscript, 2, d, theta
(选择 E)
space, integral, start subscript, 0, end subscript, start superscript, start fraction, pi, divided by, 2, end fraction, end superscript, 2, d, theta

不会做了？

积分学

课程: 积分学 > 单元 4

问题