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Re: algebra is easy ok lol

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BrookeSwaggaMeow is not online. BrookeSwaggaMeow
Joined: 25 Aug 2012
Total Posts: 2136
24 May 2014 10:38 PM
Idk y its so hard to some people
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Redesigning is not online. Redesigning
Joined: 09 Mar 2014
Total Posts: 20083
24 May 2014 10:39 PM
Wait until you approach Pre-calculus and Calculus.

inb4mods
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roblox1012 is not online. roblox1012
Joined: 15 Oct 2008
Total Posts: 3191
24 May 2014 10:39 PM
ya its my best subject
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bibbs123 is not online. bibbs123
Joined: 03 Jun 2008
Total Posts: 24994
24 May 2014 10:40 PM
then can you help me with some homework

2cos(2x)-1=0

what is x
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comiconor is not online. comiconor
Joined: 26 May 2009
Total Posts: 16893
24 May 2014 10:42 PM
@bibbs

I tried to do it mentally, and I think x = 30.
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meinkraftr is not online. meinkraftr
Joined: 09 Mar 2014
Total Posts: 14136
24 May 2014 10:44 PM
algebra starts off easy
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BrookeSwaggaMeow is not online. BrookeSwaggaMeow
Joined: 25 Aug 2012
Total Posts: 2136
24 May 2014 10:46 PM
I'm sorry but I lied
I suck at algebra
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ImTheSuperior is not online. ImTheSuperior
Joined: 30 Oct 2011
Total Posts: 20754
24 May 2014 10:48 PM
Not surprised, you're 11
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comiconor is not online. comiconor
Joined: 26 May 2009
Total Posts: 16893
24 May 2014 10:48 PM
My calculator agrees.

My mental reasoning:

2cos(2x)-1=0
2cos(2x) = 1
cos(2x) = 1/2

Now, I remember from something I was talking about with my freind who is trying to teach himself trigonometry (I taught myself a while ago) that sin(30) = 1/2, and I remember remarking that there is a counterpart for cos, which I am fairly sure is 60. 2x = 60, so x = 30.
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whyOmustOitObeOme is not online. whyOmustOitObeOme
Joined: 29 Aug 2009
Total Posts: 15668
24 May 2014 10:48 PM
@bibb

what's the "cos" supposed to be? I'm in algebra and I've never seen that
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BrookeSwaggaMeow is not online. BrookeSwaggaMeow
Joined: 25 Aug 2012
Total Posts: 2136
24 May 2014 10:50 PM
Superior, just because I say I'm 11, it doesn't always mean I'm telling the truth.
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bibbs123 is not online. bibbs123
Joined: 03 Jun 2008
Total Posts: 24994
24 May 2014 10:50 PM
it'd be 15, 115, 195, 345 degrees, aka pi/6, 11pi/6, 13pi/6, 23pi/12

i think
i did it mentally just now
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BrookeSwaggaMeow is not online. BrookeSwaggaMeow
Joined: 25 Aug 2012
Total Posts: 2136
24 May 2014 10:51 PM
Jk I'm 11 sorry for lying
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Blockfied is not online. Blockfied
Joined: 20 Nov 2011
Total Posts: 32167
24 May 2014 10:51 PM
Uh I'm pretty sure I took algebra and passed the ECA cos isn't in Algebra 1.
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comiconor is not online. comiconor
Joined: 26 May 2009
Total Posts: 16893
24 May 2014 10:51 PM
@Why

it's the trigonometry function cosine.

If we have a right angle triangle, and we know the hypotenuse (c), and one of the two angles (besides the 90 degrees), then if we multiply the length of the hypotenuse by the cosine of the angle, then we get the length of the side connected to the angle like this <, and if we multiply the length of the hypotenuse by the sine of the angle, we get the length of the side opposite the angle.
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INROAD is not online. INROAD
Joined: 09 Oct 2011
Total Posts: 118180
24 May 2014 10:51 PM
the first assignment easy A.
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comiconor is not online. comiconor
Joined: 26 May 2009
Total Posts: 16893
24 May 2014 10:52 PM
@bibbs

I disagree with you.

x = 30 degrees, 390 degrees, etc.
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whyOmustOitObeOme is not online. whyOmustOitObeOme
Joined: 29 Aug 2009
Total Posts: 15668
24 May 2014 10:52 PM
@Comic

Are you talking about the Pythagoras theorem?
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comiconor is not online. comiconor
Joined: 26 May 2009
Total Posts: 16893
24 May 2014 10:52 PM
No, I'm not.
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whyOmustOitObeOme is not online. whyOmustOitObeOme
Joined: 29 Aug 2009
Total Posts: 15668
24 May 2014 10:53 PM
Well then I have no idea what you just said since I haven't taken trig yet
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bibbs123 is not online. bibbs123
Joined: 03 Jun 2008
Total Posts: 24994
24 May 2014 10:54 PM
wait no i just did 2sin(2x)-1=0

pi/6, 5pi/6, 7pi/6, 11pi/6 in radians
30, 150, 210, 330 degrees

mental trig woo
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bibbs123 is not online. bibbs123
Joined: 03 Jun 2008
Total Posts: 24994
24 May 2014 10:56 PM
so yeah, you were basically right. you just only got one of the x values
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bibbs123 is not online. bibbs123
Joined: 03 Jun 2008
Total Posts: 24994
24 May 2014 11:01 PM
remind me to never do trig this late at night
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Spirographic is not online. Spirographic
Joined: 17 Aug 2007
Total Posts: 19084
24 May 2014 11:06 PM
All I can say is that I personally loathe quadratics.

We've spent the entire semester focusing on those things, and despite trying time and time again to think of some use for them(any use), even from a high-level programming standpoint, I have failed.

I've never had to use quadratics to create a parabola in programming. The idea of it is preposterous when a loop can do the same thing with a simple subtraction problem on a 2-axis plane.
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bibbs123 is not online. bibbs123
Joined: 03 Jun 2008
Total Posts: 24994
24 May 2014 11:23 PM
quadratics come up a lot in science so
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