Proof of the derivative of cosx: A Step-by-Step Proof and Explanation

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In this video, we dive into the proof of the derivative of cos(x) using limit definition of the derivative, also known as the first principle.
Follow along as we break down each step and provide a clear explanation of the process.
Enhance your understanding of trigonometric derivatives with this comprehensive tutorial.

If you're eager to explore more differentiation techniques for various functions, click the link below.

Stay tuned for a variety of upcoming differentiation videos. Additionally, I recommend watching the easy integration videos using the Box Rule below, as they will complement your learning experience.

Also, there are various other videos available on my channel and more will be uploaded continuously, so feel free to visit and check them out.

#derivatives #differentiation #mathwithalex
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Комментарии
Автор

I love the conversion into cos^2 - 1 = -sin^2; my usual approach is the double angle formulae cos^2 - 1 = 2 sin^2, which feels more tricky than the approach you gave.

kindiakmath
Автор

Difficult to read, no focus and numbers too small.

luisclementeortegasegovia