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May 26th, 2009, 07:22 PM   #1
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Help me derive the formula

Please help me derive the formula for "h".


The "h2" is "h squared". I dunno how to make 2 a superscript.

This is the formula of spherical segment. Hope you can help me with this. Thanks a lot!
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May 27th, 2009, 05:54 AM   #2
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That's a cubic in h. To find out how to solve a cubic equation, consult an algebra textbook or use Google.
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derive, formula

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