Find the unit tangent vector T(t) at the point with the given value of the parameter t. r(t)=cos t i+3 t j+2 sin 2 t k, t=0 相关知识点: 试题来源: 解析 r'(t)=-sin t i+3 j+4 cos 2 t k ⇒ r'(0)=3 j+4 k. Thus T(0)=( r'(0))(| r'(0)|)=1(...
vector n. 1.【数】矢量;向量 2.【生】(传染疾病的)介体、载体 3.【术语】(航空器的)航线 unit n. 1.(作为计算单位等的单个的事物、人或群体或构成复杂整体的)单位,单元 2.(作为计量的)单位 3.(机器的)部件,元件,构件;(组织的)单位 4.(组合家具、成套设备等的)组合件 externally tangent 【计】...
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook unit tangent [′yü·nət ′tan·jənt] (mathematics) A unit vector in the tangent plane at a point of a surface. McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by ...
Let u be a unit vector tangent to M ⊂ R3 at a point p. Then the number k(u) = S(u) • u is called the normal curvature of M in the u direction. In this context, we define a tangent direction to M at p to be a one-dimensional subspace L of Tp(M), that is, a lin...
tangent名— 切线名 · 正切线名 tangent vector— 切向量 a unit名— 单位名 unit vector— 单位向量 查看更多用例•查看其他译文 查看其他译文 © Linguee 词典, 2024 ▾ 外部资源(未审查的) [...] support for floating-point operations to the CEVA-XCvectorprocessorunit,inaddition ...
Normal vectors of a Curve Definition: at a point where κ≠0, the principal unit normal vector for a smooth curve in the plane is N=1κdTds. 关于,N 我们知道以下几点: 1、 ∵r⋅drdt=0∴N⋅T=1κ(dTds⋅T)=0, 即和N和T 相互垂直。 2、 1κ系数使得 N 也成为单位向量。 3、 ...
沪江词库精选unit tangent是什么意思、英语单词推荐 单位切线 相似短语 unit tangent 单位切线 unit tangent vector 单位切向量 tangent to ...的切线 at a tangent 沿着切线的方向,突然扯到题外 horizontal tangent 水平切线 inflectional tangent 拐切线 tangent cylinder 切柱面 tangent formula 切线公式...
Find the unit tangent vector at the indicated point of the vector function \vec r(t)=e^{7t}cos \ t \vec i+e^{7t} sin \ t \vec j+e^{7t} \vec k Find the unit tangent vector at the indicated point of the vector function. r(t) = e^{17t} ...
So if I evaluatev(0)→|v(0)→|I should be able to get the unit tangent vector at the desired point. Yes, the unit tangent isv(0)→|v(0)→|. However, you made finding v(t) more complicated than necessary and I don't think you got it right in the end. Factor out a -e^(...
Find unit tangent vector at indicated point Homework Statement Find the unit tangent vector at the indicated point of the vector function r(t) = e(19t)costi + e(19t)sintj + e(19t) kT(pi/2) = <___i+___j+___k>Homework Equations r'(t) / |r'(t)| The Attempt at a Solution...