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ChrisV
Group Title
Find the derivative of the trigonometric function.
f(x)=x+tanx
 2 years ago
 2 years ago
ChrisV Group Title
Find the derivative of the trigonometric function. f(x)=x+tanx
 2 years ago
 2 years ago

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Mimi_x3 Group TitleBest ResponseYou've already chosen the best response.2
Well, the derivative of tanx = sec^2x. so.. \[f'(x) = 1 + \sec^2x\]
 2 years ago

ChrisV Group TitleBest ResponseYou've already chosen the best response.0
hmmmm how do i knw the derivative of tanx = sec^x?
 2 years ago

Directrix Group TitleBest ResponseYou've already chosen the best response.0
y' =sec²x  1 http://www.wolframalpha.com/input/?i=derivative+of+y+%3Dx+%2B+tan%28x%29
 2 years ago

Mimi_x3 Group TitleBest ResponseYou've already chosen the best response.2
Well, you have to like memorise the derivative of it.
 2 years ago

ChrisV Group TitleBest ResponseYou've already chosen the best response.0
and the book says tan^2x so i assume sec^2x 1 = tan^2x
 2 years ago

Mimi_x3 Group TitleBest ResponseYou've already chosen the best response.2
Yes. Its a trig identity.
 2 years ago

ChrisV Group TitleBest ResponseYou've already chosen the best response.0
oh i belive mimi just asking for my knowledge
 2 years ago

ChrisV Group TitleBest ResponseYou've already chosen the best response.0
dont want someone just doing my homework for me
 2 years ago

ChrisV Group TitleBest ResponseYou've already chosen the best response.0
id rather learn then just write down the correct answer :)
 2 years ago

Directrix Group TitleBest ResponseYou've already chosen the best response.0
You have to know the basic trig identities. Just a few of them and they are related.
 2 years ago

ChrisV Group TitleBest ResponseYou've already chosen the best response.0
i am just wondering why my book doesnt tell me this before asking this question
 2 years ago

ChrisV Group TitleBest ResponseYou've already chosen the best response.0
oh i know the trig identities but not the derivatives
 2 years ago

ChrisV Group TitleBest ResponseYou've already chosen the best response.0
like i know 1sin^2 = cos^2
 2 years ago

Directrix Group TitleBest ResponseYou've already chosen the best response.0
http://www.math.com/tables/derivatives/more/trig.htm
 2 years ago

ChrisV Group TitleBest ResponseYou've already chosen the best response.0
but that didnt teach me the derivative of cos^2
 2 years ago

ChrisV Group TitleBest ResponseYou've already chosen the best response.0
thanks i looked at it :)
 2 years ago

ChrisV Group TitleBest ResponseYou've already chosen the best response.0
so i need to memorize these too?
 2 years ago
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