Understanding Rotating Coordinate Systems: A Visual Approach

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SUMMARY

This discussion focuses on understanding the transformation between rotating coordinate systems, specifically the equations x = u cos(θ) - v sin(θ) and y = u sin(θ) + v cos(θ). The user struggles with visualizing the relationship between the variables u, x, and y within this context. A solution is provided by multiplying the equations by cos(θ) and sin(θ), leading to a clearer understanding of how u can be expressed in terms of x and y. The key takeaway is that visualizing these transformations is essential for grasping the underlying concepts of rotating coordinate systems.

PREREQUISITES
  • Understanding of trigonometric functions and their properties
  • Familiarity with coordinate transformations
  • Basic knowledge of vector representation in mathematics
  • Experience with visualizing geometric relationships
NEXT STEPS
  • Study the concept of polar coordinates and their relationship to Cartesian coordinates
  • Explore visual tools for understanding coordinate transformations, such as graphing software
  • Learn about the applications of rotating coordinate systems in physics and engineering
  • Investigate advanced topics in multivariable calculus, particularly multiple integrals
USEFUL FOR

Students in mathematics or physics, educators teaching coordinate systems, and anyone interested in visualizing complex transformations in geometry.

xzibition8612
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Homework Statement



http://www.brookscole.com/math_d/sp...athematica_labs/14-multipleintegrals/p05a.pdf



Homework Equations





The Attempt at a Solution



My question concerns the (1) and (2) next to the figure of the rotating coordinate system.

x=ucos(theta)-vsin(theta)
y=ucos(theta)...
...

So my problem is I can't visualize it. I can visualize that u = ucos(theta) + usin(theta), but I don't get how u = xcos(theta) + ysin(theta).
If anyone can explain or try to visually show it to me would be great. Thanks.
 
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Hi,xzibition8612.

Multiply both side of equatlity (1) x=ucos(theta)-vsin(theta) with cos(theta) and both of equality y=ucos(theta)...with sin(theta) you will see some terms will vanish.And you will get your answer...
 
ok i did as you said and got u = sin(theta)y + xcos(theta) which is (2). I still don't get how come u is this quantity. I mean in a visual manner. I'm not so smart to understand it abstractly. Sorry for my poor intelligence.
 

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