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Question: approximation to the norm of vector summation

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iamaeag

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Hi~Pals
I have a trouble about the math question.
Please see the attached picture.
Hope everybody can give me some suggestions.
Thank you.

Best regards.
 

Let y <<1, then cos(y)≈1 - (y^2)/2, sin(y) ≈ y. Substitute it into your formula.
 

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    iamaeag

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Hi htg,

Thanks to your help.

I will try this approximation latter.
 

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