netphoria do my homework: simple trigonometry

LittleWing · 02-13-2008, 03:12 AM

how do you solve for x with something like

cos(x) = (1/3)

bja1288 · 02-13-2008, 03:16 AM

cos

-1(1/3)=x
use your calculator

Warsaw · 02-13-2008, 03:16 AM

Nate the Grate · 02-13-2008, 03:17 AM

post/av

(black kids can't do trig, silly!)

edit: and again! neither can willie nelson!

slutbutt · 02-13-2008, 03:17 AM

meth amphetamines actually hinder the part of your brain that processes math

Warsaw · 02-13-2008, 03:28 AM

Quote:

Originally Posted by Nate the Grate

post/av

(black kids can't do trig, silly!)

He is correct though!

bja1288 · 02-13-2008, 03:37 AM

dont be hatin on miss bridges

loser2d · 02-13-2008, 03:45 AM

who in the fuck is miss bridges?

bja1288 · 02-13-2008, 03:52 AM

if it wasnt for her, you wouldnt get to go to school with fellows like this
http://vigilantejournalist.com/blog/...1/l1021416.jpg

Mablak · 02-13-2008, 03:56 AM

The cosine function can be expressed as an infinite sum:
http://mathworld.wolfram.com/images/...dEquation4.gif

So basically you just have to use trial and error by hand to find the x that gives you 1/3, I don't know any other way. Try starting with x = 5.7, I've got a feeling about that number.

bja1288 · 02-13-2008, 03:59 AM

dont be dumb. cosine oscillates from 1 to -1 back and forth. they want you to say when the value is 1/3. at 1.23 radians the value is 1/3. but you can add + or - 2pi to this and the answer is still right because cosine is periodic

Mablak · 02-13-2008, 04:03 AM

Quote:

Originally Posted by bja1288

dont be dumb. cosine oscillates from 1 to -1 back and forth. they want you to say when the value is 1/3. at 1.23 radians the value is 1/3. but you can add + or - 2pi to this and the answer is still right because cosine is periodic

Really, exactly 1.23 radians (scoff)? I think what LittleWing needs is an exact answer, something your precious calculator methods can't provide.

bja1288 · 02-13-2008, 04:08 AM

im just making sure you dont send him down the wrong path like finding an infinite sum for an elementary trig class. the answer hes looking for is inverse cos(1/3) anyways

duovamp · 02-13-2008, 04:09 AM

Best. Argument. Ever.

bja1288 · 04:18 AM

dont make me beat you over the head with my ti-83+ and poke you with the perfectly sharpened pencil stored in my pocket protector

cutuphalfdead · 02-13-2008, 04:16 AM

What a wonderful thread.

duovamp · 02-13-2008, 04:17 AM

Quote:

Originally Posted by bja1288

dont make me beat you over the head with my ti-83 and poke you with the perfectly sharpened pencil stored in my pocket protector

If it isn't a TI-83 Plus then I won't hear it. My 86 will rock your shit and don't you forget it.

teh b0lly!!1 · 02-13-2008, 04:49 AM

this is the best thread ive ever read

FOR ME TO POOP ON

Ever · 02-13-2008, 05:20 AM

Quote:

Originally Posted by duovamp

Best. Argument. Ever.

Thanks

02-13-2008, 03:12 AM	#1
LittleWing Apocalyptic Poster Posts: 1,666	netphoria do my homework: simple trigonometry how do you solve for x with something like cos(x) = (1/3)

02-13-2008, 03:16 AM	#2
bja1288 Apocalyptic Poster Posts: 2,206	cos-1(1/3)=x use your calculator

02-13-2008, 03:16 AM	#3
Warsaw Minion of Satan Posts: 5,446	del

02-13-2008, 04:11 AM	#15
bja1288 Apocalyptic Poster Posts: 2,206	dont make me beat you over the head with my ti-83+ and poke you with the perfectly sharpened pencil stored in my pocket protector Last edited by bja1288 : 02-13-2008 at 04:18 AM.

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02-13-2008, 03:17 AM	#4
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slutbutt Banned Location: The million masks of God Posts: 248	meth amphetamines actually hinder the part of your brain that processes math

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02-13-2008, 03:45 AM	#8
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02-13-2008, 03:52 AM	#9
bja1288 Apocalyptic Poster Posts: 2,206	if it wasnt for her, you wouldnt get to go to school with fellows like this http://vigilantejournalist.com/blog/...1/l1021416.jpg

02-13-2008, 03:56 AM	#10
Mablak Minion of Satan Location: Well, if it isn't my old friend, Mr. McGreg, with a leg for an arm and an arm for a leg! Posts: 6,413	The cosine function can be expressed as an infinite sum: http://mathworld.wolfram.com/images/...dEquation4.gif So basically you just have to use trial and error by hand to find the x that gives you 1/3, I don't know any other way. Try starting with x = 5.7, I've got a feeling about that number.

02-13-2008, 03:59 AM	#11
bja1288 Apocalyptic Poster Posts: 2,206	dont be dumb. cosine oscillates from 1 to -1 back and forth. they want you to say when the value is 1/3. at 1.23 radians the value is 1/3. but you can add + or - 2pi to this and the answer is still right because cosine is periodic

02-13-2008, 04:08 AM	#13
bja1288 Apocalyptic Poster Posts: 2,206	im just making sure you dont send him down the wrong path like finding an infinite sum for an elementary trig class. the answer hes looking for is inverse cos(1/3) anyways

02-13-2008, 04:09 AM	#14
duovamp Brazilian Blouselord Location: heavy metal pool party Posts: 35,674	Best. Argument. Ever.

02-13-2008, 04:16 AM	#16
cutuphalfdead Amish Rake Fighter Location: Boston Posts: 13	What a wonderful thread.

02-13-2008, 04:49 AM	#18
teh b0lly!!1 Braindead Location: PROWLING THE BADLANDS Posts: 16,215	this is the best thread ive ever read FOR ME TO POOP ON