Chapter 9: Problem 40
What is meant by the trace of a surface? How do you find a trace?
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Chapter 9: Problem 40
What is meant by the trace of a surface? How do you find a trace?
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Find the angle \(\theta\) between the vectors. $$ \mathbf{u}=\cos \left(\frac{\pi}{6}\right) \mathbf{i}+\sin \left(\frac{\pi}{6}\right) \mathbf{j}, \quad \mathbf{v}=\cos \left(\frac{3 \pi}{4}\right) \mathbf{i}+\sin \left(\frac{3 \pi}{4}\right) \mathbf{j} $$
Let \(A, B,\) and \(C\) be vertices of a triangle. Find \(\overrightarrow{A B}+\overrightarrow{B C}+\overrightarrow{C A}\)
Find each scalar multiple of \(v\) and sketch its graph. \(\mathbf{v}=\langle 2,-2,1\rangle\) (a) - \(\mathbf{v}\) (b) \(2 \mathbf{v}\) (c) \(\frac{1}{2} \mathbf{v}\) (d) \(\frac{5}{2} \mathbf{v}\)
Prove the triangle inequality \(\|\mathbf{u}+\mathbf{v}\| \leq\|\mathbf{u}\|+\|\mathbf{v}\|\).
The vertices of a triangle are given. Determine whether the triangle is an acute triangle, an obtuse triangle, or a right triangle. Explain your reasoning. $$ (-3,0,0),(0,0,0),(1,2,3) $$
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