anonymous
  • anonymous
Help!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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goformit100
  • goformit100
ya say
anonymous
  • anonymous
goformit100
  • goformit100
solve it by cosine rule

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More answers

anonymous
  • anonymous
I don't know how to.
anonymous
  • anonymous
|dw:1339191253421:dw|
anonymous
  • anonymous
use it
anonymous
  • anonymous
How? I don't have all the measurements.
anonymous
  • anonymous
You don't need all the measurements
anonymous
  • anonymous
One sec
anonymous
  • anonymous
|dw:1339195102769:dw|
anonymous
  • anonymous
You know what b, c, and angle theta are. all you have to do is plug it in and solve for a
anonymous
  • anonymous
Okay
anonymous
  • anonymous
I got 130.9 and that isn't and option.
anonymous
  • anonymous
one sec
anonymous
  • anonymous
Could you explain to me how you got your answer?
anonymous
  • anonymous
I just tried to plug everything in like you said. 7^2+9^2-2(7)cos(117). I got 136.35. I did something wrong the first time. But its obviously still wrong.
anonymous
  • anonymous
Ok here's where you are wrong. It's 7^2+9^2-2ab cos 117. Can you see where you went wrong? (hint: you're missing b)
anonymous
  • anonymous
You did -2(7), the correct term should be -2(7)(9) because it is -2ab
anonymous
  • anonymous
Okay. I thought I forgot a number. Ill try it again.
anonymous
  • anonymous
187.20?
anonymous
  • anonymous
Yes!
anonymous
  • anonymous
|dw:1339192083258:dw|
anonymous
  • anonymous
You are correct!
anonymous
  • anonymous
found ur answer?
anonymous
  • anonymous
Medal please lol
anonymous
  • anonymous
I picked 187.2 and it said the correct answer is 13.68.
anonymous
  • anonymous
answer is 187.20

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