jackfrost33
  • jackfrost33
help!!! how do you find a cosine ratio?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
you got an example?
anonymous
  • anonymous
|dw:1444181898957:dw| here is my example \[\cos(x)=\frac{4}{5}\]
anonymous
  • anonymous
but that not be what you mean a specific question would help

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jackfrost33
  • jackfrost33
i just need to know how to find the angle.
anonymous
  • anonymous
the angle or the cosine of the angle?
jackfrost33
  • jackfrost33
the cosine of an angle
anonymous
  • anonymous
do you have the sides of a right triangle?
jackfrost33
  • jackfrost33
yeah hypotenuse is 2 long leg is sr of 3 and short leg is 1
jackfrost33
  • jackfrost33
sr is square root
anonymous
  • anonymous
oh ok
anonymous
  • anonymous
it is the length of the "adjacent' side over the length of the hypotenuse
anonymous
  • anonymous
so it kind of depends on which angle and how it is oriented
anonymous
  • anonymous
do you know what i mean by "adjacent" ?
jackfrost33
  • jackfrost33
yes
anonymous
  • anonymous
|dw:1444182288625:dw|
anonymous
  • anonymous
so in the above picture \[\cos(x)=\frac{a}{h}\]
anonymous
  • anonymous
|dw:1444182390167:dw|
anonymous
  • anonymous
if it looks like that, then \[\cos(x0=\frac{\sqrt3}{2}\] but it may not look like that
anonymous
  • anonymous
|dw:1444182488404:dw| for this one \[\cos(x)=\frac{1}{2}\]
jackfrost33
  • jackfrost33
the problem i was given looked like this..|dw:1444182458243:dw|
anonymous
  • anonymous
ok looks like the first one i drew
jackfrost33
  • jackfrost33
yes
anonymous
  • anonymous
except my square root sign was more artful you have \[\cos(30^\circ)=\frac{adjacent}{hypontenuse}=\frac{\sqrt3}{2}\]
jackfrost33
  • jackfrost33
so i would just solve the equation then
anonymous
  • anonymous
btw you also have \[\sin(x)=\frac{opposite}{hypotenuse}=\frac{1}{2}
anonymous
  • anonymous
oops \[\sin(x)=\frac{opposite}{hypotenuse}=\frac{1}{2} \]
anonymous
  • anonymous
there is no equation to solve that is your answer
anonymous
  • anonymous
the answer to \[\cos(30^\circ)\] is \[\frac{\sqrt3}{2}\]
jackfrost33
  • jackfrost33
thanks so much really.
anonymous
  • anonymous
yw you got more, or is that it?
jackfrost33
  • jackfrost33
yeah theres more like 20 more but i think i can get them.
anonymous
  • anonymous
ok good luck!
jackfrost33
  • jackfrost33
thx

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