Basic trigonometry question regarding knee angle

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The discussion centers on a basic trigonometry question related to calculating the knee angle, which is ultimately solvable using algebra rather than trigonometry or vectors. Participants clarify that the problem involves finding the distance between two points based on their coordinates, which can be addressed through algebraic methods. There is an emphasis on posting homework questions in the appropriate forum for better assistance. The consensus is that understanding the problem does not require knowledge of vectors or trigonometry. Algebra is sufficient to solve the question effectively.
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The screen shot of the question is attached, this is apparently a basic trig question but it doesn't feel that way. Please explain as much as possible! Thanks!
 

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Homework questions should be posted in the appropriate homework forum. Follow the template there and make sure you explain where you need help at. That way you can get the best help possible!
 
You don't need any trig, just algebra. Follow Drakkith's suggestion if you still need help.
 
Do they do vectors in algebra? I don't remember that.
 
Drakkith said:
Do they do vectors in algebra? I don't remember that.

you don't need vectors or trig, just algebra. You're given the coordinates of two points and asked to find the distance between them. That's just algebra
 
phinds said:
you don't need vectors or trig, just algebra. You're given the coordinates of two points and asked to find the distance between them. That's just algebra

Ah, ok. I just glanced at it and saw vectors.
 

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