Math Is Fun Forum
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#1 2006-11-18 08:28:20
- Dharshi
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- Registered: 2006-10-31
- Posts: 56
How to find this?
sin (x+ delta x) - sin x = 2 cos ( x +(delta x)/2) sin (deltax/2)
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#2 2006-11-19 04:08:55
- John E. Franklin
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- Registered: 2005-08-29
- Posts: 3,588
Re: How to find this?
When you say "how to find this", are you asking how the first person ever found this in history?, or are you asking how can we use known formulas to justify steps between these two equations??
igloo myrtilles fourmis
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