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Math Help!

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Posts: 14 - Karma: 10
Write tan14x in terms of tan7x alone.

I have no idea, help me out.
Apr 19 2011 7:45PM
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pimpcat
Posts: 858 - Karma: 321
Not another Math thread. The last one was slightly fucked up.
Apr 19 2011 7:46PM
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killa_cam
Posts: 13143 - Karma: 15
tan x = sin x / cos x

sin 2 x = 2 sin x cos x

cos 2 x = 1 - 2sin^2 x
Apr 19 2011 7:48PM
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Anathema
Posts: 21048 - Karma: 5,061
yo 14/7 is 2 so im sure there's a 2 in there somewhere .

one is glad to be of service .
Apr 19 2011 7:57PM
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Gingeski
Posts: 100 - Karma: 16
wolframalhpa.com ? I dont really understand the question otherwise I'd love to help you more
Apr 19 2011 8:04PM
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Gingeski
Posts: 100 - Karma: 16
sorry for dub post
www.wolframalpha.com
Apr 19 2011 8:05PM
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Posts: 14 - Karma: 10
in the back of my textbook it says: (2tan7x)/(1-tan^2(7x))

if that helps
Apr 19 2011 8:24PM
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RunRich
Posts: 207 - Karma: 11
math is the work of the devil
Apr 19 2011 8:28PM
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ORDEAL
Posts: 6386 - Karma: 75
This. Just skip it
Apr 19 2011 8:30PM
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pimpcat
Posts: 858 - Karma: 321
Calculus was my kryptonite last semester. Fuck it. I'll just write abstract poetry.

violin, meat, needle
These are cool.
Smile.
Apr 19 2011 8:31PM
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DirtyDan
Posts: 1576 - Karma: 158
I'm doing trig right now in school as well.
It makes me want to throw myself off the nearest cliff...


Daily
Apr 19 2011 8:31PM
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Gingeski
Posts: 100 - Karma: 16
Trig isnt really that horrible, wait until you get to integrals. . . They WILL be the death of you. This is just a stupid question
Apr 19 2011 8:33PM
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a_pla5tic_bag
Posts: 9215 - Karma: 5,398
After this semester I'm never taking math again. I'm at some level of calc right now, and it satisfies the requirements for a bio major so after this, fuck math.
Apr 19 2011 8:35PM
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MothaHucker
Posts: 4678 - Karma: 2,591
i just took a test on this shit today
Apr 19 2011 8:36PM
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gregorio
Posts: 2372 - Karma: 151
you're kidding right? Trig is so much harder than calc. Trig is the only thing that I have ever struggled with in math ever
Apr 19 2011 8:38PM
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p-fo
Posts: 9372 - Karma: 6,155
It's a tangent expansion. Treat it like tan2(7x) then use the expansion formula, which is tan2x=2tanx/(1-tan^2(x)), substituting 7x for x.

Boom.
Apr 19 2011 8:40PM
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Doug.
Posts: 2236 - Karma: 457
Really? I had no trouble in trig. Im in calc now and its not too bad either, but I would say trig is definately easier.
Apr 19 2011 9:34PM
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AWALLRUS.
Posts: 5762 - Karma: 223
i have a 32 in math right now. fuuuuuuuuuuuuuuuuuuuuuck
Apr 19 2011 9:36PM
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Gingeski
Posts: 100 - Karma: 16
Thank you! Only thing I hate in calc is integrals because my teacher thinks it's fun to give us ones that took him YEARS to solve, we get five difficult ones weekly
Apr 19 2011 9:52PM
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snowbombz
Posts: 2456 - Karma: 96
If anyone here is in the seattle public school system, there is this math sub called Sr. Pablo, who is super into conspiracies, and if you are having a test that day, start talking about the Illuminati or something like that and there ya go! NO MORE TEST!
Apr 19 2011 9:55PM
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Fluttershy
Posts: 586 - Karma: 763
17
Apr 19 2011 9:57PM
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no_steeze
Posts: 23992 - Karma: 4,272
math is so ghey

i'm enjoying calculus though. it's the only math i've ever liked
Apr 19 2011 9:57PM
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Jaymon
Posts: 860 - Karma: 1,213
Meth Halp!
Apr 19 2011 10:05PM
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