Mathematics
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OpenStudy (anonymous):
Complete the following item. Consult the table above to find the cosine number.
Find A to the nearest degree.
A degrees.
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OpenStudy (anonymous):
OpenStudy (amistre64):
\[A = \cos^{-1}(267/391)\]
OpenStudy (anonymous):
0.68?
OpenStudy (amistre64):
that is the cosine of the angle yes; 0.68286.......
OpenStudy (anonymous):
but that cant be the degree thats to long
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OpenStudy (amistre64):
the angle tho is the \(cos^{-1}\) of that number
OpenStudy (amistre64):
46.932..... degrees
OpenStudy (amistre64):
the inverse trig function take a 'ratio' as input and give back 'angles' for outputs
OpenStudy (amistre64):
cos(A) = .68286......
A = cos^-1(.68286....)
A = 46.932....
OpenStudy (anonymous):
i tryed that its not correct maybe its to lon?
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OpenStudy (anonymous):
long
OpenStudy (amistre64):
then round it to the nearest instructional requirement
OpenStudy (amistre64):
the 'nearest' degree is....47 then right?
OpenStudy (anonymous):
yes your right :)
OpenStudy (anonymous):
its confusing learning it the first time around
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OpenStudy (amistre64):
lol .... its confusing learning it the last time round too :)
OpenStudy (anonymous):
so then lts say you have 100 and 75.5 you would divide it right ?
OpenStudy (anonymous):
and get 1.324503311
OpenStudy (amistre64):
it depends on where the numbers are located and what trig function you can apply to them to get the answer
OpenStudy (anonymous):
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OpenStudy (anonymous):
like that
OpenStudy (amistre64):
sin = over/slant
cos = nextto/slant
tan = over/nextto
OpenStudy (amistre64):
A is nextto 75.5 and the slant is 100; go with cos
OpenStudy (amistre64):
cos(A) = 75.5/100
A = cos-1(75.5/100)
OpenStudy (amistre64):
i get; A = 40.974....
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OpenStudy (anonymous):
which then is 41?
OpenStudy (amistre64):
yep
OpenStudy (anonymous):
thank you :)
OpenStudy (amistre64):
youre welcome :)
OpenStudy (anonymous):
i dont get though how you got 40.974