Converting from x-y to a-b coordinates-is this correct?

Thread starter annas425
Start date Mar 2, 2014

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annas425

Thread starter
Mar 2, 2014

Converting from x-y to a-b coordinates--is this correct?

Picture of the two relative coordinate systems, and what I think (though I'm unsure) is the correct conversion. If someone could reaffirm or deny this (and tell me what would be correct), that would be great! Thank you in advance! :)