Question

Differentiate by ab-initio method cos X.​

Answer 1

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The derivative of cos x is −sin x (note the negative sign!) and. The derivative of tan x is sec2x. Now, if u = f(x) is a function of x, then by using the chain rule, we have: d ( sin ⁡ u ) d x = cos ⁡ u d u d x

Answer 2

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$\huge \color{red} \boxed{\colorbox{lightgreen}{ANSWER :)}}$

Explanation:

The derivative of cos x is −sin x (note the negative sign!) and. The derivative of tan x is sec2x. Now, if u = f(x) is a function of x, then by using the chain rule, we have: d ( sin ⁡ u ) d x = cos ⁡ u d u d x.

$\huge \colorbox{pink}{❥ᴛʜᴀ᭄ɴᴋs}$