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Mathematics 20 Online
OpenStudy (anonymous):

http://prntscr.com/3y6o7z

OpenStudy (anonymous):

@zepdrix

OpenStudy (anonymous):

\[Sin x (2Sinx - 1) = 0\] is what I got after some work and I can't figure out how to get any further

OpenStudy (anonymous):

yes your work is right then either sinx = 0 => x = 0 , pi or sinx = 1/2 => x = pi/3

OpenStudy (anonymous):

Can you re-write that in the equation editor? I'm all over the place right now

OpenStudy (anonymous):

\[sinx = 0 \rightarrow x = { 0 , \frac{ \pi }{ 2 } }\] \[2sinx -1 = 0 \rightarrow sinx = \frac{ 1 }{ 2 } \rightarrow x = \frac{ \pi }{ 6 }\]

OpenStudy (anonymous):

Why is Trig so confusing???

zepdrix (zepdrix):

Woops lemme fix a small mistake he made, \[\Large\rm \sin x=0,\qquad\to\qquad x=0,~ \pi\]\[\Large\rm \sin x=\frac{1}{2},\qquad\to\qquad x=\frac{\pi}{6},~\frac{5\pi}{6}\]

OpenStudy (anonymous):

So what is that? The answer?

zepdrix (zepdrix):

Yes. Do you have trouble remembering your special angles? :o

zepdrix (zepdrix):

Trig is so awesome +_+ Gotta really get an understanding of that unit circle though.

OpenStudy (anonymous):

I don't even have the trig identities memorized

OpenStudy (anonymous):

I have a sheet taped to the wall in front of my Monitor with all the Trig identities on it

OpenStudy (anonymous):

Trig sounds fun. But it seems very hard at first. I was the best in my class with math. Now that trig comes along, it's starting to piss me off

zepdrix (zepdrix):

Lol poor guy :3

OpenStudy (anonymous):

What are the special angles anyways?

zepdrix (zepdrix):

|dw:1404181110508:dw|These are the special angles in the first quadrant.

zepdrix (zepdrix):

|dw:1404181166579:dw|Cosine of an angle corresponds to the x component while the Sine corresponds to the y or vertical component.

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