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Unformatted text preview: N , and we just deFne the magnitude to be . In other words, we see that d ds B = N . Now we approach the derivative of N . We can write N = B T , just by thinking about the right hand rule. Now we dierentiate this, using the previous rules: d N ds = p d B ds P T + B p d T ds P = N T + B N . Now we just rewrite the cross products using the right hand rule: N T + B N = B T . 1...
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 Spring '09
 Stojanovic
 Vectors, Formulas

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