The dot product [math: a⋅b]\mathbf{a}\cdot\mathbf{b} is zero when (choose one or more)多项选择题

题目图片
A

a. [math: b]\mathbf{b} is zero

B

b. [math: a]\mathbf{a} and [math: b]\mathbf{b} are perpendicular

C

c. [math: a]\mathbf{a} is zero

D

d. [math: a]\mathbf{a} and [math: b]\mathbf{b} are parallel

E

e. none of the others

登录即可查看完整答案

我们收录了全球超50000道真实原题与详细解析,现在登录,立即获得答案。

类似问题

Question text Let \[ \mathbf{a} = \langle 1,-3,4 \rangle \quad \text{and} \quad \mathbf{b} = \langle 0,5,5 \rangle. \] The dot product \( \mathbf{a} \cdot \mathbf{b} \) is given by \( \mathbf{a} \cdot \mathbf{b} = \) Answer 1 Question 6[input]. The angle between \( \mathbf{a} \) and \( \mathbf{b} \) is Answer 2 Question 6[select: , zero, acute, a right angle, obtuse, a straight angle].

For which value of 𝑐 will the vectors 𝑢 = ( 2 3 𝑐 − 4 1 5 ) and 𝑣 = ( 6 − 1 3 7 2 𝑐 ) be orthogonal?

vector a  is =  2 6     What's the value of a * at ?

Question text 2Marks Consider the position vectors [math: a=2i+3j−6k]\textbf{a}=2\textbf{i}+3\textbf{j}-6\textbf{k} and [math: b=2i−j+2k]\textbf{b}=2\textbf{i}-\textbf{j}+2\textbf{k}. The angle between [math: a]\textbf{a} and [math: b]\textbf{b} is [math: arccos⁡(]\arccos\big( Answer 1[input][math: /]\Big/ Answer 2[input] [math: )]\big).(The denominator should be a positive integer. The fraction should be written in an irreducible form) Notes Report question issue Question 18 Notes

更多留学生实用工具

加入我们，立即解锁 海量真题 与 独家解析，让复习快人一步！