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November 7th, 2017, 10:18 AM   #1
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Math Focus: dynamical systen theory
A demonstration

Dear MyMathForum Community:

Let f(x) = sin(x). Show that

(f(x+h) - f(x))/h = sin(x)((cos(h) - 1))/h + cos(x)(sin(h)/h).

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Carl James Mesaros is offline  
November 7th, 2017, 10:27 AM   #2
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Math Focus: Mainly analysis and algebra
Use the obvious trigonometric identity.
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