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  1. #1
    FlexGod's Avatar
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    Question In Need Of a Asian :)

    I need someone to explain this nonsense to me





    Is that right? And if it is can you explain it to me.


    Don't be a Dix i'm trying to study for a math test tomorrow and i'm failing math at the moment. Help a nigga out

    I might have more questions if someone is good at this.
    NightOwl


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    Scotia's Avatar
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    Are you in 7th grade or some shit?

    It's the sin rule.

    sin90 x sin62
    ___________ = Your answer, something similar anyways, may be sin90 x 7.2 tho, I don't remember, been years since I did this shit.
    7.3

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    Nope, it's 6.4 use law of sines.

    a/sinA=b/sinB=c/sinC
    C=90 degrees
    B=62 degrees
    side b=7.3

    so,

    7.3/sin62=x/sin90

    isolate x by multiplying sin90

    x=(7.3/sin62)(sin90)
    x=6.4




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    Quote Originally Posted by Shane View Post
    Nope, it's 6.4 use law of sines.

    a/sinA=b/sinB=c/sinC
    C=90 degrees
    B=62 degrees
    side b=7.3

    so,

    7.3/sin62=x/sin90

    isolate x by multiplying sin90

    x=(7.3/sin62)(sin90)
    x=6.4
    How do i tell when to use cos sin or tan depending on the triangle?

    And could you type it how you would put it in a caculator or a TI-30XIIS to be specific
    NightOwl


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    Mayion's Avatar
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    Quote Originally Posted by Scotia View Post
    Are you in 7th grade or some shit?
    I'm grade 11 and i still take these stuff.
    ------
    OT: I'll search for the rules.

    I do not have an active Skype -- Always confirm via PM on MPGH when contacting me.
     



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    Scotia's Avatar
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    Quote Originally Posted by Mayion View Post

    I'm grade 11 and i still take these stuff.
    ------
    OT: I'll search for the rules.
    It's the sin rule, no need to search it up.

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    Quote Originally Posted by flex1178 View Post
    How do i tell when to use cos sin or tan depending on the triangle?

    And could you type it how you would put it in a caculator or a TI-30XIIS to be specific
    In this type of situation there is no need to use cos or tan because it's law of sines, but if you're asking when you wanna use sin cos and tan, it's only when you have a right triangle: 90 degrees.

    sin: opposite/hypotenuse
    cos: adjacent/hypotenuse
    tan: opposite/adjacent

    (using Pythagorean theorem to find hypotenuse)




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  11. #8
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    Quote Originally Posted by Shane View Post

    In this type of situation there is no need to use cos or tan because it's law of sines, but if you're asking when you wanna use sin cos and tan, it's only when you have a right triangle: 90 degrees.

    sin: opposite/hypotenuse
    cos: adjacent/hypotenuse
    tan: opposite/adjacent

    (using Pythagorean theorem to find hypotenuse)
    7.3/sin(62)sin(90)
    When i enter that every time i get 8.26 which rounds up to 8.3
    Obviously i'm wrong but how do I fix it?
    NightOwl


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    You can just use logic to answer this question... The highest degree side will be the longest. The right angle is = 90 degrees. The 7.3 is 62 degrees. 90 + 62 = 152. 180 - 152 = 28. The third degree is 28. This means the longest side will correspond to the 90 degree. This makes it longer than 7.3 so 8.3 is you only possible answer.

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    Aborted's Avatar
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    SOHCAHTOA motherfucker.
    Sine opposite Hypotenuse
    Cosine adjacent Hypotenuse.
    Tangent opposite Adjacent.
    I am the seer in the dark,
    the vagabond of yore,
    valediction.
    I am the sum of all your parts,
    and proprietor of all.
    A miasma,
    the conclusion,
    blackmonger of Inlé,
    valediction.
    Synapses fray,
    my form now vivid,
    as torpor sets and blood grows tepid.
    With every ounce of flesh now offered,
    I hold your corpse within my coffers.
    Knitted cells now split asunder,
    stand alongside me brother.
    Take your place amongst my Owsla,
    we march at dawn now and forever.


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    Scotia's Avatar
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    Quote Originally Posted by Aborted View Post
    SOHCAHTOA motherfucker.
    Sine opposite Hypotenuse
    Cosine adjacent Hypotenuse.
    Tangent opposite Adjacent.
    He would need the lengh of 2 sides for that, he only has 1 side along with 2 angles, meaning it's the sin rule.

    Aborted got a maths question wrong? Witchcraft.

  16. #12
    Aborted's Avatar
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    Quote Originally Posted by Scotia View Post


    He would need the lengh of 2 sides for that, he only has 1 side along with 2 angles, meaning it's the sin rule.

    Aborted got a maths question wrong? Witchcraft.
    I never even looked at the diagram, just the question asking for the length of side AB.
    Of course it's the law of sines if you have 2 angles and a side, it's the direct inverse.


    Edit: Looked at the diagram, and yeah it's law of sines, but your equation is incorrect.
    sin62 goes over 7.3, not sin90
    It's the side opposite, not adjacent.

    sin90 = sin62
    -------- ...-------
    x ......... 7.3

    Last edited by Aborted; 10-23-2014 at 06:03 PM.
    I am the seer in the dark,
    the vagabond of yore,
    valediction.
    I am the sum of all your parts,
    and proprietor of all.
    A miasma,
    the conclusion,
    blackmonger of Inlé,
    valediction.
    Synapses fray,
    my form now vivid,
    as torpor sets and blood grows tepid.
    With every ounce of flesh now offered,
    I hold your corpse within my coffers.
    Knitted cells now split asunder,
    stand alongside me brother.
    Take your place amongst my Owsla,
    we march at dawn now and forever.


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  18. #13
    FlexGod's Avatar
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    Quote Originally Posted by Aborted View Post

    I never even looked at the diagram, just the question asking for the length of side AB.
    Of course it's the law of sines if you have 2 angles and a side, it's the direct inverse.


    Edit: Looked at the diagram, and yeah it's law of sines, but your equation is incorrect.
    sin62 goes over 7.3, not sin90
    It's the side opposite, not adjacent.

    sin90 = sin62
    -------- ...-------
    x ......... 7.3

    Got 6.4

    So First i enter sin and the 2 angles then multiply it by the one side and wala?
    NightOwl


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    Majin Vegeta's Avatar
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    Quote Originally Posted by Scotia View Post
    Are you in 7th grade or some shit?

    It's the sin rule.

    sin90 x sin62
    ___________ = Your answer, something similar anyways, may be sin90 x 7.2 tho, I don't remember, been years since I did this shit.
    7.3
    You better be Asian, OP was very specific >.<

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    Aborted's Avatar
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    Quote Originally Posted by flex1178 View Post
    Got 6.4

    So First i enter sin and the 2 angles then multiply it by the one side and wala?
    Oh shit, formatting got jacked up.
    Should be side length over angle, not angle over side length.

    ...x .........7.3
    .----- ...= -----
    sin90 ..sin62

    We are solving for x, so we need to isolate it from the rest of the equation.
    To do that, we multiply both sides by sin90, which results in:

    x= (7.3/sin62)sin90

    The sine of 90 is always 1, so the inside of our parentheses stays the same.

    Now we solve.
    sin62= 0.88294

    7.3/0.88294 = 8.3

    x=8.3

    There you have it

    1. Set up your equation.
    2. Isolate your variable.
    3. Solve.
    Last edited by Aborted; 10-23-2014 at 06:23 PM.
    I am the seer in the dark,
    the vagabond of yore,
    valediction.
    I am the sum of all your parts,
    and proprietor of all.
    A miasma,
    the conclusion,
    blackmonger of Inlé,
    valediction.
    Synapses fray,
    my form now vivid,
    as torpor sets and blood grows tepid.
    With every ounce of flesh now offered,
    I hold your corpse within my coffers.
    Knitted cells now split asunder,
    stand alongside me brother.
    Take your place amongst my Owsla,
    we march at dawn now and forever.


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