- #1

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f(x)=xcos(sen(x)) – 1

f'(x)= ?

f''(x)= ?

Thank you.

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- Thread starter schmitt
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- #1

- 3

- 0

f(x)=xcos(sen(x)) – 1

f'(x)= ?

f''(x)= ?

Thank you.

- #2

I like Serena

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f(x)=xcos(sen(x)) – 1

f'(x)= ?

f''(x)= ?

Thank you.

What kind of function is sen(x)?

Or did you mean sec(x)?

- #3

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If that sen(x) is indeed a sec(x) then just use the **product** rule between x and cos(sec(x)). The -1 becomes 0. When you get the new function derive it again and you'll have f''(x).

You might be asking for the answer in which case I won't be giving you because you'll never learn it yourself.

Woops. Just realized that mistake I made. That was embarrassing.

You might be asking for the answer in which case I won't be giving you because you'll never learn it yourself.

Woops. Just realized that mistake I made. That was embarrassing.

Last edited:

- #4

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What kind of function is sen(x)?

Or did you mean sec(x)?

sorry, its "sin(x)"

- #5

Mark44

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BTW, there is no such word as "derivating" in English, and I doubt that it is a word in any other language. To find the derivative of a function, we differentiate the function - we don't "derivate" it or "derive" it.

Starting with ax

- #6

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Got it solved already, sorry for the bad english.

Topic can be deleted.

Topic can be deleted.

- #7

Mark44

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We don't delete the topics so that other people with similar questions can learn from them.

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