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  1. #1
    Senior Member
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    Jan 2005
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    Who's skilled at Calculus?

    I have an assignment due this week, my tutor is a putz!

    f(x)=sin(x^2+2x+1)

    find the inverse!

    so interchange x and y and solve for y

    x=sin(y^2+2y+1)

    Please help me solve for y...trig makes me freak out and lose my mind!

    Thanx,
    Just thought I would keep you all on your toes

    Kim

  2. #2
    Senior Member
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    Dec 2004
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    i took caculus a few years back, but i guess i dont remember to well. sorry

    thank god i dont have to do that anymore

  3. #3
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    Sep 2003
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    y^2 + 2y + 1 = arcsin(x)

    (y+1) ^2 = arcsin(x)

    y = -1 +/- sqrt(arcsin(x))

    I'm not sure this simplfies.

    However, this isn't really calculus. Have we got your question right?
    Nick

  4. #4
    Moderator cres's Avatar
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    Jul 2004
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    If you followed Nick, you see that first he used this relationship:

    if: f1(x)=f2(y)
    then: arcsin(f1(x))=arcsin(f2(y))
    Basically, do the same thing to both sides.

    and, arcsin(sin(x))=x.

    Then he used the fact that
    (y+1)^2=y^2+2y+1
    (Get used to memorizing a few of these they will come up again and again.)

    And, by solving for y, when x has a value of 1.0, you find y=-1+/-1.25=-2.25 or +.025 and therefore your Nitrates are under control. ;-)
    Sarchasm: The gulf between the author of sarcastic wit and the person who doesn't get it.

  5. #5
    Senior Member hippo!'s Avatar
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    Dec 2004
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    oooooh so long ago, all forgoten now :blush:

    lol, nice close cres

  6. #6
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    Jan 2005
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    Thanx,

    I'm onto my second term of Calculus...and yeah sometimes the Trig and Algebra throw me off! I've been out of school for so long and decided to go back...hehe!

    Kim

  7. #7
    Senior Member
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    Jan 2004
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    Damn Thanx Sophic, Now I realized that I have learned all this for nothing, because I was totally unable to resolved your equation... :dork:

  8. #8
    Senior Member
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    Jan 2005
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    Hey and I used to love Calculus even showed the Prof how to answer some questions! But that was a over a decade ago! I can answer the really tuff questions but ask me the easy ones :huh??: :huh??:

  9. #9
    Senior Member
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    Aug 2003
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    Originally posted by Sophic
    I can answer the really tuff questions but ask me the easy ones :huh??: :huh??:
    So.., why is the world flat and why is the sky blue?!!!

  10. #10
    Senior Member Deafboy's Avatar
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    Mar 2004
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    Originally posted by Toutouche
    So.., why is the world flat and why is the sky blue?!!!
    The sky is blue!?!?!??
    20 g reef, 72 g reef

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