Tuesday, August 18, 2009

HELP!!

ok so when you have ...
Given h(x) = 5cot(x) + 2tan(x), what is h'(x)?

i don't understand what h' means or how to get it...i know it's prime but i don't understand what prime means either..

10 comments:

  1. If you look in your notes the prime tells you to take a derivative.

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  2. ok that's what i've been doing, but i'm not sure if it's right...for this one, would it be:
    5(-csc^2(x))+cot(x)(5) which would take out the stuff from the plus on cause 5 is zero?
    oh and then you have 2tan(x) so that would be:
    2(sec^2(x))+ tan(x) (2) and the two is zeor?
    so total it would be:
    5(-csc^2(x))+ 2(sec^2(x))
    would that be the answer??

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  3. THe answer would be 5csc^2(x) + 5sec^2(x) you don't do a product rule. We went over that today in class. If there is a number in front you just ignore it. You don't need to keep taking derivatives you had it in the first line.

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  4. so what happened to the negatives was the derivatives??

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  5. oh and what about after the + sign... shouldn't it be 2 sec^2(x) instead of the 5

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  6. yea csc should be -ve and it should be a 2. For some reason I could swear I read two fives.

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  7. lol..ok so just the csc is neg...
    i thought it would be a neg. sec too...right?

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  8. oh no nvm..i looked at the wrong thing too..sorry

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