anonymous
  • anonymous
@zepdrix
Trigonometry
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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zepdrix
  • zepdrix
Hmm darn, I have plenty of resources for Calculus... I can't think of any for trig though haha.
anonymous
  • anonymous
I'm looking at yesterdays problems...one seconds.... we should probably start with inverses of trig functions..one second
anonymous
  • anonymous
http://tutorial.math.lamar.edu/Extras/AlgebraTrigReview/SolveTrigEqn.aspx

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anonymous
  • anonymous
do these look difficult enough (for me)
zepdrix
  • zepdrix
Hmm they look pretty simple. I wouldn't say they're way easier than what we were working on yesterday. They might be worth spending some time on c:
zepdrix
  • zepdrix
Take a stab at #3
anonymous
  • anonymous
yeah they look too easy....I'll find some harder ones \[sin(5x)=-\frac{\sqrt 3}{2}\] |dw:1362793858479:dw| am I right so far?
zepdrix
  • zepdrix
Solve for x! :)
zepdrix
  • zepdrix
I mean, yes you're right so far!
zepdrix
  • zepdrix
Keep in mind we want to rotate in the positive direction. So make sure your angle corresponds to that.
anonymous
  • anonymous
\[sin^{-1}(-\sqrt{3}/2)=5x\] uhm I'm stuck \[\frac {5\pi} 3\]
zepdrix
  • zepdrix
\[\large 5\pi/3=5x\] So you found that your angle, \(\large 5x\) was equal to the special angle \(\large 5\pi/3\). Looks good so far.
anonymous
  • anonymous
oh so that is right!
anonymous
  • anonymous
\[x=\frac {\pi}{3}\]
zepdrix
  • zepdrix
Yay good job
anonymous
  • anonymous
wait, that's it? what did we just discover?
anonymous
  • anonymous
wait wait wait....
zepdrix
  • zepdrix
There is some angle \(\large 5x\) that corresponded to the given equation. And we were ultimately trying to find 1/5 of that angle. No waiting! >:O lol
anonymous
  • anonymous
LOL \[sin(5x)=-\frac{\sqrt 3}{2}\] why are we trying to find 1/5 of that angle do you mean: "there is some angle x"
zepdrix
  • zepdrix
Our angle is the thing inside of the trig function. Think of it maybe as like, \(\large 5x=\theta\). We want to solve for part of that angle. But for the purposes of relating this to special angles, it's good to think of the entire contents as the angle. :)
anonymous
  • anonymous
I am.....so why are we trying to find 1/5 of that angle? Oh you're just saying we solve for x which is 1/5th of that angle....I think I get it
anonymous
  • anonymous
si?
zepdrix
  • zepdrix
si c: I'm just being a little technical I guess.
anonymous
  • anonymous
It makes sense :)
anonymous
  • anonymous
should we do a more difficult problem? what are these problems called \[sec\left(cos^{-1}\frac 12\right)\] I feel sooooo d u m b LOL
zepdrix
  • zepdrix
lol poor gal c:
zepdrix
  • zepdrix
Ok so we're dealing with an inverse even function on the inside. So our angle will be in the 1st or second quadrant, yes? Hmmm +1/2. Is that a length to the right, or left? :D
anonymous
  • anonymous
I will feel smarter by the end of the weekend....hopefully.... When I Know How To Do These Darn Problems o.O
anonymous
  • anonymous
right
anonymous
  • anonymous
the length to the right
anonymous
  • anonymous
I found some nice aerobics music!!!!
zepdrix
  • zepdrix
lol that was random XD
anonymous
  • anonymous
Thanks :)
anonymous
  • anonymous
I'm planning to work out in 15 mins
anonymous
  • anonymous
I just need to find a way to download it
zepdrix
  • zepdrix
Oh i see c:
anonymous
  • anonymous
....so these problems are called inverse functions within trig functions? i"m trying to find some problems on google.
zepdrix
  • zepdrix
Sorry I'm not quite sure what they're called :( Maybe something Composition of Trig functions...
zepdrix
  • zepdrix
http://www.ck12.org/book/CK-12-Trigonometry-Concepts/r1/section/4.6/ Near the bottom there is a \(\large \text{Practice}\) section. Some good problems there.
anonymous
  • anonymous
anonymous
  • anonymous
which one should a take a stab at?
zepdrix
  • zepdrix
5
anonymous
  • anonymous
\[tan(cos^{-1}1)\] \[cos\alpha =1\] at zero and \(2\pi\)
zepdrix
  • zepdrix
\[\large \tan(0)\] K looks good so far.
anonymous
  • anonymous
hmmmmm..... 0? final answer
zepdrix
  • zepdrix
Yes good!
anonymous
  • anonymous
yayyayayayayay!!!!! ok I'm gonna work out now. THanks!!!
zepdrix
  • zepdrix
Cya c:

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