briana.img
  • briana.img
Can someone walk me through this problem? I always have a hard time with this.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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briana.img
  • briana.img
briana.img
  • briana.img
@EmilyF03 excuse me?
briana.img
  • briana.img
I tried this but it didn't seem to work for me \[ 8^2=4^2+7^2-2(4)(7)\cos\]

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ganeshie8
  • ganeshie8
\[ 8^2=4^2+7^2-2(4)(7)\cos(\theta)\]
ganeshie8
  • ganeshie8
isolate \(\cos(\theta)\) first
briana.img
  • briana.img
i ended up with -57=cosT but i don't think that's right
ganeshie8
  • ganeshie8
you should end up with -1 = -56cos(T) right?
ganeshie8
  • ganeshie8
dividing -56 both sides gives you 1/56 = cos(T)
briana.img
  • briana.img
don't i need to put it in cos^-1(-56) ?
jim_thompson5910
  • jim_thompson5910
cos(T) ? shouldn't it be cos(R) since you want to find m < R ?
briana.img
  • briana.img
@jim_thompson5910 ooh oops yepp i was just going off an example in my notes
jim_thompson5910
  • jim_thompson5910
ah, gotcha

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