Edexcel A level Maths: 9.1 First Principles, Differentiating Sin(x) and Cos(x)

Pearson A level Maths, Pure Year 2 textbook (9.1)

In this video I start by introducing differentiation from first principles and then use this idea to differentiate sin and cos. Then I go onto show a general approach to finding the derivative of any sin or cos function.

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[highvanguard]

Yesss sir, allhamdullilah good to see you again doing maths in the easiest way, 👏

[msbloodfilms]

I hope these videos blow up, incredibly well explained

[sarahsandy]

AMAZING content! Thank you so much! Please do chapter 11 (Integration) - I find this hard:(

[JO-jfne]

Need to show my friends before it’s too late

[Stellaurius]

For the last example, do you know why it wouldn't be negative reciprocal for the gradient, as it's for the tangent to the curve?

[fatmajaedy]

PLEASE DO DEFFERIANTION YEAR 1 CHAPTER 8 and thank you for helping us

[samaths]

Hey, quick question:

In the first differentiation proof example, where did the -sin( x) go???
How does it cancel out??

[sashapetukhov]

what a legend. could not find any YouTube video with trig differentiation explanations. Keep it up.