YesterdayiSaidTomorow
Explain how to find the exact value of Sin 30°



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pradiv
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.9880316241
calculator click on sin(30) = .9880316241


pradiv
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it's probably 1 then

YesterdayiSaidTomorow
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it's 1/2 but I keep on getting sqrt(3) / 2

akhaliq99
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it is 1/2

YesterdayiSaidTomorow
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Yes but how do you find it?

akhaliq99
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look at until circle

akhaliq99
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actually make a triangle


akhaliq99
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then the sides are sqrt(3) and 1 is hypotunuse


akhaliq99
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switch 1 and sqrt(3)




akhaliq99
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welcome

akhaliq99
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memorize unit circle youll need it


akhaliq99
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write it out once

akhaliq99
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look it up on google

hammytams
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my calculator says sin 30 is 0.5

YesterdayiSaidTomorow
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help... how do I find sin120?

akhaliq99
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sqrt(3)/2

YesterdayiSaidTomorow
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but how? Shouldn't it be the same as sin30?

akhaliq99
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use unit circle it will make life easy

akhaliq99
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its a 30 60 90 triangle

akhaliq99
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no sin of 150 is same as 30




akhaliq99
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turn on coordinates

YesterdayiSaidTomorow
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i don't want to memorize... i want to learn how to do it manually :(

YesterdayiSaidTomorow
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what's wrong with my triangle? Is the right angle in the wrong place?

akhaliq99
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yes it turned upside down

YesterdayiSaidTomorow
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but why? don't you start at 0 degrees? From where do you start?


YesterdayiSaidTomorow
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OH I GOT IT NOW! Thanks for the site!