so this girl sends me an IM

BeefJurky

Senior member
Sep 5, 2001
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and asks me a math question.... i hate math, and i've never taken multi-variable calculus, which this is apparently a preparatory problem for.... anyone know what the solution is and/or know how to do it?

x = sin (3t)
y = sin (4t)
eliminate t
 

fataIerror

Senior member
Mar 10, 2001
820
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Most smartass answer I can come up with at 2:30 in the morning....

Answer is x = sin (3)
y = sin (4)

Hey, I eliminated the t's. Works for me.
 

spanky

Lifer
Jun 19, 2001
25,716
4
81
i hate math too. good luck to ya. since it is a prep test... it is multiple choice right? choose "B" :D
 

dowxp

Diamond Member
Dec 25, 2000
4,568
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76
LOL. that doesnt work.

kinda vague. get rid of T? if its a variable and NOT a constant, its kinda hard. any relation with X & Y? is this partial derivatives?
 

Orsorum

Lifer
Dec 26, 2001
27,631
5
81
t = (arcsin x)/3
t = (arcsin y)/4

arcsin y = (4/3) arcsin x
y = sin ((4/3) arcsin x)
 

Nemesis77

Diamond Member
Jun 21, 2001
7,329
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well duh! She obviously wants to have sin with you! She just needs to get rid of "t" first. Who is "t"? I have no idea, boyfriend maybe?
 

timmyG

Senior member
Oct 12, 2000
536
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Originally posted by: Nemesis77
well duh! She obviously wants to have sin with you! She just needs to get rid of "t" first. Who is "t"? I have no idea, boyfriend maybe?

T is obviously short for Mr. T, the girls BF. good luck man. i pity the foo who messes wit mr. T.
 

ElFenix

Elite Member
Super Moderator
Mar 20, 2000
102,407
8,595
126
Originally posted by: BeefJurky
and asks me a math question.... i hate math, and i've never taken multi-variable calculus, which this is apparently a preparatory problem for.... anyone know what the solution is and/or know how to do it?

x = sin (3t)
y = sin (4t)
eliminate t

there was no girl, you know you're trying to do your homework.
 

KingNothing

Diamond Member
Apr 6, 2002
7,141
1
0
Originally posted by: Zakath15
t = (arcsin x)/3
t = (arcsin y)/4

arcsin y = (4/3) arcsin x
y = sin ((4/3) arcsin x)

This as posted by several people is correct. It's not multivariable calculus as such, it's a parametric equation. X and Y in terms of T, the elapsed time. You start by taking the inverse sine (or arcsin) of both sides, which gets the 3t and 4t outside the parens. Then you divide the respective sides by 3 and 4, and since both equations are then equal to t they're equal to themselves, and you multiply both sides by y to get the y part by itself. Then you take the sine of both sides to get just the y by itself.
 

guyver01

Lifer
Sep 25, 2000
22,135
5
61
Originally posted by: KingNothing
This as posted by several people is correct. It's not multivariable calculus as such, it's a parametric equation. X and Y in terms of T, the elapsed time. You start by taking the inverse sine (or arcsin) of both sides, which gets the 3t and 4t outside the parens. Then you divide the respective sides by 3 and 4, and since both equations are then equal to t they're equal to themselves, and you multiply both sides by y to get the y part by itself. Then you take the sine of both sides to get just the y by itself.

:confused: