All Questions
3
questions
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vote
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What does being proportional mean?
Question:
Two concurrent forces act along the sides CA and CB of a triangle. Their magnitudes are proportional to $\cos (A)$ and $\cos (B)$ respectively. Prove that their resultant is proportional to $...
- 3,186
1
vote
0
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Vectors proof: Find all planes passing through intersection of two planes
I would appreciate help on the vectors chapter of bostock and chandler core course. They give the following proof purportedly finding all planes passing through the intersection line of two ...
- 347
3
votes
2
answers
250
views
help with a vector proof
Let $\textbf{u}$ and $\textbf{v}$ be non-zero vectors. Show that any two-dimensional vector can be expressed in the form
$$s \textbf{u} + t \textbf{v},$$where $s$ and $t$ are real numbers, if and only ...
- 4,581