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anonymous
 one year ago
please help ^.^
anonymous
 one year ago
please help ^.^

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geekfromthefutur
 one year ago
Best ResponseYou've already chosen the best response.0That's devil math xD

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1can u use unit circle ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0all that I know have to do is draw the angle given, and then find cosine and sine, I don't think it matters how I get it done I just have to show my work

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1i like degrees so if you want you can convert radians to degree 7pi/4 times 180/pi

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes right which is dw:1433361087764:dwin 4th quadrant

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433361160024:dw draw a right traingle near to the axis we need that reference angle which is 45 360315 = 45 now you have to use 454590 triangle

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok I think I understand...

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1http://prntscr.com/7crrp5 right here dw:1433361396623:dw sin = opposite over hypotenuse cos = adjacent over hypotenuse

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1dw:1433361539015:dw what is opposite side of 45 angle ?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1do you now how to find 454590 triangle from the unit circle ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I'm a little lost.. I know that 1 is opposite the 45

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes right and hypotenuse is the longest side of right triangle which is ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh whatever you know what I mean

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes right so \[\huge\rm sin =\frac{ 1 }{ \sqrt{2} }\] no radicals should be at the denominator so that's why we have to multiply both top and bottom by sqrt{2} \[\huge\rm sin =\frac{ 1 }{ \sqrt{2} } \times \frac{\sqrt{2}}{\sqrt{2}}\] sovle that

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0umm... \[\frac{ \sqrt{2} }{ 2 }\] ?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1. guess? well that's right now cos = adjacent over hyp so cos= ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so \[\frac{ 45 }{ \sqrt{2} }\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0(and it wasn't a guess, i was just trying to remember when I had learned that, hoping I did it right from my memory)

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1nope adjacent (side that touchzdw:1433362268317:dw the angle )

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0oh so \[\frac{1 }{ \sqrt{2} }\]

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0wouldn't it be the same as the other one?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes right so (x ,y) x represent cosine y coordinate represent sin for signs remember CAST rule dw:1433362536321:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0whoa just got a little lost...

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1alright it's okay so what part u didn't understand ?? :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0why do we need (x, y) what part of the problem does that fit into?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes that's what you need cosine and sin value dw:1433362805558:dw

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1x coordinate represent cosine y represent sin and that order pair we just found which is cosine = sqrt{2}/2 sin =sqrt{2}/2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1433362859876:dw so you're saying this is x, and this is y?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1nope all angles ha' one x and one y value dw:1433362920755:dw unit circle is almost like normal x y graph CAST rule is easy to remember negative and plus signs like we are in 4th quadrant where only cos values are positive sin is negative and tan is negative so angle 315 cosine and sin value are \[(\frac{ \sqrt{2} }{ 2 } , \frac{ \sqrt{2} }{ 2 })\]

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1http://prntscr.com/7cs6pe here is a unit cricle

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\[\left( \frac{ \sqrt{2} }{ 2 }, \frac{ \sqrt{2} }{ 2 } \right)\] so then wouldn't it be like this?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I don't get why the second is negative....

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1yes right but it's in 4th quadrant where y values are negative right so sin suppose to be negative

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0OH because sine is negative... sorry

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1it's like normal x y graph dw:1433363292356:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0OMG IT JUST CLICKED!!! that took my brain way too long >.<

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@geekfromthefutur perhaps you'd like a math lesson? XD
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