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anonymous
 one year ago
Need some Trig HElp
anonymous
 one year ago
Need some Trig HElp

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what do you need help with?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i will attach the file, give me a second

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1hmm, try replacing cos^2 with 1  sin^2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0which attachment are you on

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1\[3\sin(\theta)+3 = 2\cos^2(\theta)\]

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1ok, it looks like you can factor that now if you put it in ax^2+bx+c form , with the x being sin

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1\[2\sin^2(\theta)+3\sin(\theta)+1=0\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0wait but this is what my equation looks like so far... is it right

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1right, from the unit circle , there is the property, sin^2 + cos^2 = 1, that is what we did

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1then just simplify that down to

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1\[2\sin^2(\theta)+3\sin(\theta)+1=0\]

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1so you can factor that like usual quadratics , let v=sin(theta) 2v^2 + 3v + 1 = 0

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1replace v back with sin(theta) \[(\sin \theta + 1)(2\sin \theta +1) = 0\]

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1that is true if either of those parenthesis terms are zero, so you have \[\sin(\theta) = 1~~~or~~~\sin(\theta) = 1/2\]

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1do you know how to figure those from the unit circle?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yeah, but im kind of weak in my unit circle so i might get it wrong

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1Ill tell ya, soon as you get that picture, everything clicks good...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok should I gust google unit circle

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1http://www.embeddedmath.com/downloads/files/unitcircle/unitcircleletter.pdf

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1do you want a quick rundown of it, how to determine angles

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i just needed a brush up

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1aight, what are the answers for this one

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0the answers are pi/2, 3pi/2, pi/6, 7p/6

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1read the problem one more time through...

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh so it is just 3pi/2 and 7pi/6

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1not quite... lets look at the first one... sin(theta) = 1 Each point on the circle is the coordinate (cos , sin) , the y coordinate is the sin of the angle... y is 1 at 270 or 3pi/2

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1for sin(theta) = 1/2 there are 2 angle values where the y coordinate is 1/2

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1i remember taking trig and never got how angles were figured till this circle pic , after the class was over

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1radius is 1, so sin = opp/hyp = opp/1 = opp , or the y coordinate

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thats helpful thanks

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so the solutions to the equation are?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Loser66 can you help me with my other questions
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