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Thread: I can't think tonight or something

  1. #26
    princeso Kirby's Avatar
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    I kinda like arc, ^-1 kinda makes you want to make it a reciprocal not an inverse.

  2. #27
    Registered Users Regular Rayne's Avatar
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    well reciprocal and inverse means the same thing.........

  3. #28
    princeso Kirby's Avatar
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    I don't know about real definitions, but secant, cosecant, and cotangent are reciprocal functions, while arc functions are inverse functions that have nothing to do with switching the numerator and denominator, but instead the x and y.

  4. #29
    In reverie, I felt you holding me. Dogar The Brave's Avatar
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    NERDSSS!!!

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  5. #30
    what about .. eyebrows God's Avatar
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    Quote Originally Posted by Rayne View Post
    i dont know why americans use arcsin. sin^-1 (sin inverse) is a better representation.
    agreed

  6. #31
    princeso Kirby's Avatar
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    Things me and God disagree about

    -foreign policy
    -Justin being funny
    -arc vs ^-1

  7. #32
    what about .. eyebrows God's Avatar
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    cos(arccot(3/4) (there is a whole series of these, I think there is a trick I am missing, there is no regular radian for 3/4)
    i dont know if you figured this out yet, but thats not how inverse functions work

  8. #33
    Registered Users Regular Flaming Flamingo's Avatar
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    TOO MUCH MATH. STOP TALKING ABOUT MATH.

  9. #34
    princeso Kirby's Avatar
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    then help me God

  10. #35
    what about .. eyebrows God's Avatar
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    cotangent inverse gives the angle of the cotangent with the contangent's value as its domain. use that and you can just draw a triangle and get A/H.

  11. #36
    princeso Kirby's Avatar
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    I am still confused, not considering cosine yet, the problem is basically cot (x) = 3/4, right? Im not quite sure for exactly cotangents work, but the only solutions I know for tangent are fractions on the basic unit circle (1, (sqrt(3)/2)/(1/2), the opposite of that, and 0). Please forgive me if I completely off, I haven't taken trig anything in over 2 years which is part of my problem.

  12. #37

  13. #38
    what about .. eyebrows God's Avatar
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    it's asking for the cosine of the angle that makes cotangent 3/4. cotangent = A/O = 3/4.

  14. #39
    princeso Kirby's Avatar
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    do you mean adjacent / opposite

    yeah uhh I still have no idea, I think I need to do some research on trig, because I couldn't even do this if it was tangent and my book gives no explaination

  15. #40
    princeso Kirby's Avatar
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    ok so I am physically looking at a triangle with a radian angle of 3 and a side of 4

    uhhhhh do I can to like recreate this triagle, then find the cosine

    isn't radian 3 over 90 degrees

    ahhhh

  16. #41
    princeso Kirby's Avatar
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    adjacent not angle....

  17. #42
    what about .. eyebrows God's Avatar
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    no.

    the triangle has an angle, it can be either angle other than the 90 it really doesn't matter. its opposite sid is 4 and its adjacent side is 3.

  18. #43
    princeso Kirby's Avatar
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    so I am looking at a triangle with sides of 3, 4, and sqrt(21)

    and looking at cos(x) = 3/sqrt(21)

    right?

  19. #44
    Defenestration is imminent pichubro's Avatar
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    ew trigonometry bleh

  20. #45
    This pic is definitely of me!! Solly's Avatar
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    Canadians use sin^-1, if that means anything

  21. #46
    The One and Only trixie's Avatar
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    I was wondering what arcsin was until I read Rayne's post. Then I was like "Oh, sin^-1 !"
    Originally made by LM:


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  22. #47
    princeso Kirby's Avatar
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  23. #48
    Registered Users Regular ElijahWyatt's Avatar
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    whats f^-1(5)?
    The f'(5) because thats simple dirivative + plugging in. what does f^-1 mean?
    "As for me, all i know is that i know nothing"

  24. #49
    Registered Users Regular Rayne's Avatar
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    what is the function that you need to plug 5 into to get the original function back

  25. #50
    Registered Users Regular ElijahWyatt's Avatar
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    arccos(2x)=arcsec(2x)
    arcsec(x) = arccos(1/x) so
    arccos(2x)=arccos(1/2x)
    cos both sides.
    2x=1/2x
    4x^2=1
    x=1/4
    "As for me, all i know is that i know nothing"

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