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Mathematics 13 Online
OpenStudy (jackfrost33):

help!!! how do you find a cosine ratio?

OpenStudy (anonymous):

you got an example?

OpenStudy (anonymous):

|dw:1444181898957:dw| here is my example \[\cos(x)=\frac{4}{5}\]

OpenStudy (anonymous):

but that not be what you mean a specific question would help

OpenStudy (jackfrost33):

i just need to know how to find the angle.

OpenStudy (anonymous):

the angle or the cosine of the angle?

OpenStudy (jackfrost33):

the cosine of an angle

OpenStudy (anonymous):

do you have the sides of a right triangle?

OpenStudy (jackfrost33):

yeah hypotenuse is 2 long leg is sr of 3 and short leg is 1

OpenStudy (jackfrost33):

sr is square root

OpenStudy (anonymous):

oh ok

OpenStudy (anonymous):

it is the length of the "adjacent' side over the length of the hypotenuse

OpenStudy (anonymous):

so it kind of depends on which angle and how it is oriented

OpenStudy (anonymous):

do you know what i mean by "adjacent" ?

OpenStudy (jackfrost33):

yes

OpenStudy (anonymous):

|dw:1444182288625:dw|

OpenStudy (anonymous):

so in the above picture \[\cos(x)=\frac{a}{h}\]

OpenStudy (anonymous):

|dw:1444182390167:dw|

OpenStudy (anonymous):

if it looks like that, then \[\cos(x0=\frac{\sqrt3}{2}\] but it may not look like that

OpenStudy (anonymous):

|dw:1444182488404:dw| for this one \[\cos(x)=\frac{1}{2}\]

OpenStudy (jackfrost33):

the problem i was given looked like this..|dw:1444182458243:dw|

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