How to Differentiate sine from first principles | ExamSolutions

Differentiate sine from first principles
Here you are shown how to differentiate from first principles the sine function.
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[@killerman-gv1qp]

Hi sir, I am not familiar with the result about limits:(sin(h)/h)-->1 as well as the cos one, do u have a separate video on that?

[@ExamSolutions_Maths]

Try this www.examsolutions.net/tutorials/small-angle-approximations/?level=A-Level&board=Edexcel&module=Pure-Maths-A-Level&topic=11804

[@sadmanzaid420]

Can't I just take limits instead of delta theta method? Much smoother and is a bit more conventional for me personally.

[@Toyahan43]

Why is sin(thetha)= sin(thetha+delta theta)?