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Mathematics 17 Online
OpenStudy (anonymous):

Complete the following item. Consult the table above to find the cosine number. Find A to the nearest degree. A degrees.

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

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?

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

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):

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....

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

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