anonymous
  • anonymous
In the triangle below, determine the value of c.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
|dw:1386101502428:dw|
jigglypuff314
  • jigglypuff314
first find the measurement of angle C then: \[\frac{ 51 }{ 90^{o} } = \frac{ c }{ (angleC) }\]
anonymous
  • anonymous
so I got 43 for angle c. I'm not sure where to go from there

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jigglypuff314
  • jigglypuff314
good, then solve for c when \[\frac{ 51 }{ 90 } = \frac{ c }{ 43 }\]so c = 51 * 43 / 90 =
anonymous
  • anonymous
when I solved it out I got a very small number that couldn't be correct
jigglypuff314
  • jigglypuff314
c = 51 * 43 / 90 51 * 43 = 2142 2142 / 90 = 23.8 c = 23.8
anonymous
  • anonymous
these are my options. 37.3 34.1 54.7 74.8
jigglypuff314
  • jigglypuff314
okay, I see... then do you know trigonometry? like sinx = opposite/hypotenuse cosx = adjacent/hypotenuse
anonymous
  • anonymous
I'm a novice but I know the basics
jigglypuff314
  • jigglypuff314
using what you're given you can get cos(48) = c / 51 do you see where I got my numbers? then multiply both sides by 51 so that c = 51cos(48) = (plug into calculator)
anonymous
  • anonymous
I do but i got -32.647361 when i put it into my calculator.
jigglypuff314
  • jigglypuff314
make sure you're calculator is in degrees mode ;) that is what you would get if your calculator was in radians mode :P
anonymous
  • anonymous
ahhhh thanks so much! so 34.1
jigglypuff314
  • jigglypuff314
yep :)

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