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Explain how to find the exact value of Sin 30°

Mathematics
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.-9880316241 calculator click on sin(30) = .-9880316241
No. I said exact value.
it's probably -1 then

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Other answers:

it's 1/2 but I keep on getting sqrt(3) / 2
it is 1/2
Yes but how do you find it?
look at until circle
actually make a triangle
|dw:1359948962457:dw|
then the sides are sqrt(3) and 1 is hypotunuse
How do you get 1/2?
switch 1 and sqrt(3)
but why?
to get 1/2 that is the triangle of 30 degrees look at this http://www.purplemath.com/modules/trig.htm
OOOOOOOOOH!! thanks!
welcome
memorize unit circle youll need it
I can't memorize stuff
write it out once
look it up on google
my calculator says sin 30 is 0.5
help... how do I find sin120?
sqrt(3)/2
but how? Shouldn't it be the same as sin30?
use unit circle it will make life easy
its a 30 60 90 triangle
no sin of 150 is same as 30
|dw:1359950275904:dw|
s = o / h s = 1 / 2??
http://www.mathsisfun.com/algebra/trig-interactive-unit-circle.html
turn on coordinates
i don't want to memorize... i want to learn how to do it manually :(
what's wrong with my triangle? Is the right angle in the wrong place?
yes it turned upside down
but why? don't you start at 0 degrees? From where do you start?
this site should explain http://www.mathsisfun.com/sine-cosine-tangent.html
OH I GOT IT NOW! Thanks for the site!

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