How to find the angle between r and the x axis?

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Homework Help Overview

The discussion revolves around finding the angle between a vector \( r \) and the x-axis, with participants examining the calculations involved in determining \( r \) and its implications for the angle measurement.

Discussion Character

  • Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants discuss the calculation of \( r \) and question the accuracy of the original poster's value, suggesting a reevaluation of the expression used to compute \( r \).

Discussion Status

There is ongoing dialogue regarding the correctness of the computed values for \( r \). Some participants have provided feedback on the calculations, and a new angle has been proposed, although there is no explicit consensus on its correctness.

Contextual Notes

Participants are working within the constraints of homework guidelines, which may limit the sharing of complete solutions. The original poster's initial angle calculation was deemed incorrect, prompting further examination of the underlying computations.

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You miscalculated r.
 
Recheck how you computed the expression for r. The expression with the square root looks ok, but I find that it evaluates to 4.6, not 8.5.
 
fzero said:
Recheck how you computed the expression for r. The expression with the square root looks ok, but I find that it evaluates to 4.6, not 8.5.

Ok so i got 86.64 is that correct?
 
Looks right.
 

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