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October 13th, 2014, 08:49 AM   #1
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About implicit diff. problem

Here again~I need your help~
a implicit diff.
$\displaystyle c^2=a^2+b^2-(2ab)\cosθ ,\frac{da}{db}=?$

Last edited by skipjack; October 13th, 2014 at 11:04 AM.
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October 13th, 2014, 09:18 AM   #2
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Quote:
Originally Posted by superzhong View Post
Here again~I need your help~
a implicit diff.
$\displaystyle c^2=a^2+b^2-(2ab)\cosθ ,\frac{da}{db}=?$
What have you tried? Are c and theta considered to be constants?

-Dan

Last edited by skipjack; October 13th, 2014 at 11:05 AM.
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