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OpenStudy (juicstice):
the question?
OpenStudy (anonymous):
@Juicstice
OpenStudy (juicstice):
tan is opposite/adjacent
OpenStudy (anonymous):
can u please show me how to do it, im failing my class and i need to hurry up and finish
OpenStudy (juicstice):
so the side OPPOSITE of A is 8 the side ADJACENT to A is 15
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OpenStudy (anonymous):
but the choices are
8/15
15/8
17/8
8/17
OpenStudy (juicstice):
it is 8/15
OpenStudy (anonymous):
thank you so much!!
can i show you another one?
OpenStudy (juicstice):
yes
OpenStudy (anonymous):
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OpenStudy (juicstice):
the formula for this is a little complicated, but I can show you
OpenStudy (juicstice):
no it really isn't
okay so we know 2 angles 70 and 90
add them together
70+90=160
180-160=20
so now you know all three sides
the formula is
a/sinA=b/sinB=c/sinC
lower case is side
upper case is angle
OpenStudy (ipwnbunnies):
Juicstice, it's a right triangle. ;-;
OpenStudy (juicstice):
set up the proportion like this
x/sin(70)=4/sin(20)
OpenStudy (juicstice):
I know
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OpenStudy (juicstice):
did I do something wrong?
OpenStudy (anonymous):
the choices are
2.7
11.0
.7
4.9
OpenStudy (anonymous):
don't need all that happiness it is a right triangle
\[\tan(70)=\frac{x}{4}\iff x=4\tan(70)\] and a calculator
OpenStudy (ipwnbunnies):
Yeah, you just use tangent , again. ^^^
OpenStudy (juicstice):
okay, so I was making it a little more complicated
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OpenStudy (anonymous):
okay im confused so what do i do with 4tan(70)
OpenStudy (juicstice):
you solve for x
OpenStudy (juicstice):
just plug it into a calculator
OpenStudy (anonymous):
i got 10.98 which rounds to 11.0, thanks to all of you!
OpenStudy (juicstice):
I got 4.88
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OpenStudy (juicstice):
which rounds to 4.9
OpenStudy (anonymous):
i have another question tho
OpenStudy (anonymous):
wait really? i plugged it into the calculator tho?
OpenStudy (juicstice):
I think you plugged it in wrong
OpenStudy (anonymous):
i plugged 4 then the tan sign then 70?
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OpenStudy (juicstice):
so did I, I'l do it agin to make sure thug
OpenStudy (juicstice):
did it look like 4tan(70)
that would be how you put it in
OpenStudy (anonymous):
no it actually looked like 4xtan(70)
OpenStudy (juicstice):
I still got the same answer even when putting in the x
OpenStudy (triciaal):
70 tan * 4 = 11
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OpenStudy (anonymous):
i got 10.98 though
OpenStudy (anonymous):
which rounds to 11
OpenStudy (triciaal):
yes then to the nearest tenth
OpenStudy (juicstice):
but that isn't the answer it's 4.9 trust me
OpenStudy (anonymous):
but what if i get it wrong
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OpenStudy (juicstice):
70tan doesn't work it has to be tan(70)
OpenStudy (anonymous):
i just checked with googles calculator and i got 4.88 so i guess its is 4.9, thanks for helping me @Juicstice
OpenStudy (juicstice):
okay, I'm going to the next question
OpenStudy (juicstice):
so we are using tan again
tan is opposite/adjacent
12/35
so then tan(angle that is missing) =.342
since that doesn't solve for the angle need to make it solve for it
angle that is missing= inverse tan(.342)
OpenStudy (anonymous):
the choices are
71.1
18.9
29.2
90
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