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Author Topic: hehehe  (Read 26820 times)

Shindō

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hehehe
« on: May 05, 2011, 09:25:31 AM »
Okay. So I am new to PreCal, and I am curious. In layman's words, what is PreCal? Because so far in my PreCal classes, I am taking trigonometry. What else is in PreCal and their appliances to reality..? :D
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hiro

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Re: hehehe
« Reply #1 on: May 06, 2011, 12:34:18 AM »
Precalculus is worth nothing. >_>

They pretend that it's a precursor to calculus, but it's only there to drive trig functions in your head along with a bunch of other stuff that you will never need again like arc lengths of circles, radial velocity, conic sections, and more crap. Only things you need to remember for calc is the trig stuff and the definition of derivative.
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Quote from: Hiro on October 19, 2010, 02:37:46 AM
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Shikki

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Re: hehehe
« Reply #2 on: May 06, 2011, 01:55:55 AM »
We never learned the definition of a derivative til Calc.

But yeah, learn how to use Radians, the Trigonometric identities, and the Unit Circle. That's pretty much it.
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hiro

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Re: hehehe
« Reply #3 on: May 06, 2011, 03:56:00 AM »
Oh, yeah, I guess the unit circle is good to know. And radians is the only setting that should be used after geometry unless you're taking physics.

AND SIN^2(X) + COS^2(X) = 1
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Quote from: Hiro on October 19, 2010, 02:37:46 AM
Click me, because the actual quote doesn't fit in here.

Shindō

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Re: hehehe
« Reply #4 on: May 06, 2011, 06:20:33 AM »
How about vector?

 :twisted:Then that means I have covered the foundations of Precalculus...too bad the knowledge came at the price of a few C's...
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ShinobiIceSlayer

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Re: hehehe
« Reply #5 on: May 06, 2011, 06:45:35 AM »
I like Vectors!

But I hate Trig... I had to integrate cos^5 (Theta) Last night... it was horrible.
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hiro

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Re: hehehe
« Reply #6 on: May 06, 2011, 11:54:36 PM »
Vectors are slightly necessary. You just need to know how to recognize their notation.

And that sounds splendiferous, Ice. >_>

...OH GOD NEVERMIND THAT TOOK ME FOREVER.

(5/8)sin(x) + (5/48)sin(3x) + (1/80)sin(5x) + C

Got some crazy identities going up in thar.
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11/7/10 (EST), The Day It Rained Spam (Miha's 21st Birthday). NEVAR FORGET
Quote from: Hiro on October 19, 2010, 02:37:46 AM
Click me, because the actual quote doesn't fit in here.

ShinobiIceSlayer

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Re: hehehe
« Reply #7 on: May 07, 2011, 12:45:33 AM »
I can't remember what I got, something stupid.
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hiro

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Re: hehehe
« Reply #8 on: May 07, 2011, 01:15:53 AM »
Something that WASN'T RIGHT?!? >_>

And WTF SMILEYFACES.
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Quote from: Hiro on October 19, 2010, 02:37:46 AM
Click me, because the actual quote doesn't fit in here.

Shikki

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Re: hehehe
« Reply #9 on: May 07, 2011, 01:16:19 AM »
I hate having to integrate sin/cos^x... You've got to know the identities, substitute in, etc etc etc... Takes about ½-1 page if you show all the work like you need to for AP Exams.

But yeah, vectors are mainly just the basic definition, and notation. You'll learn how to use them in Calculus.
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ShinobiIceSlayer

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Re: hehehe
« Reply #10 on: May 07, 2011, 01:20:46 AM »
And because there are different Identities, there are different answers... mine would have still been wrong though lol
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Shikki

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Re: hehehe
« Reply #11 on: May 07, 2011, 01:21:37 AM »
No, there are specific identities you're supposed to use.

But you have to break it apart into a cos^2 and cos^3 first.
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hiro

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Re: hehehe
« Reply #12 on: May 07, 2011, 01:23:20 AM »
Integrating is usually made easier by parts, but it's still a pain in the ass for that. >_>

I was too lazy to simplify what I got, but after using Wolfram Alpha it was easier to connect the dots. I dids mah work right.
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Quote from: Hiro on October 19, 2010, 02:37:46 AM
Click me, because the actual quote doesn't fit in here.

Shikki

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Re: hehehe
« Reply #13 on: May 07, 2011, 01:24:07 AM »
I hate integrating by parts. Takes too long.
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ShinobiIceSlayer

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Re: hehehe
« Reply #14 on: May 07, 2011, 01:24:37 AM »
We can't do by parts, we've only learnt substitution... :(
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